# List of bus routes in Pittsburgh

Pittsburgh Regional Transit's bus system covers Allegheny County, and its service extends into small portions of neighboring Beaver, Butler, and Westmoreland counties. These counties also have their own transit systems, including several routes that run into Downtown Pittsburgh, where riders can make connections with Pittsburgh Regional Transit service. In 2023, the system had a ridership of 34,467,400.

## Route renumbering and realignments

From 1964 to 2010, the Port Authority used an alphanumeric numbering system. With the renumbering and realignments outlined in the Transit Development Plan in 2009, the present numbering system was adopted in April 2010.
Light rail and busways are designated by the following colors:
* Red Line—former 42S South Hills Village via Beechview light rail route
* Blue Line—former 47S South Hills Village via Overbrook light rail route
* Silver Line — former 47L Library via Overbrook light rail route
* Brown Line—former 52 Allentown light rail route (eliminated in 2011)
* Green—bus routes using the West Busway, designated with a 'G'
* Purple—bus routes using the Martin Luther King Jr. East Busway, designated with a 'P'
* Orange—bus routes using the I-279 HOV lane, designated with an 'O'
* Yellow—bus routes using the South Busway, designated with a 'Y'
As a result of the Transit Development Plan and a series of service cuts, many routes have been reworked or eliminated.

## Bus routes
### Bus operations

* Route numbers operating seven days a week including holidays (4 am to 2 am daily) are listed in Blue. On most of the daily bus routes, they operate on a 60-minute interval after 7 pm Monday through Saturday and all day on Sunday and Holidays.
* Route numbers operating Monday through Saturday with limited or no holiday hours (5 am to 10 pm weekdays; 7 am to 7 pm Saturdays) are listed in Red
* Route numbers operating Monday through Friday only (5 am to 7 pm) are listed in Bold.
* All other plain (non-bold) routes operate Monday through Friday during peak periods only (approx: 6 am to 9 am and 3 pm to 6 pm).

### Local routes

| Route number | Service level | Route name | Service area | Notes | Changes |
| 1 | Daily | Freeport Road | Downtown, North Shore, Allegheny Center, East Allegheny, Washington's Landing, Millvale, Etna, Sharpsburg, Aspinwall, Waterworks Mall, O'Hara, Blawnox, Harmar, Cheswick, Springdale, New Kensington, Creighton, Tarentum | | Formerly 1A New Kensington |
| 2 | Daily | Mount Royal | Downtown, Strip District (Weekends Only), North Shore, Allegheny Center, East Allegheny, Washington's Landing, Millvale, Etna, Shaler, McCandless, Ross | | Formerly 1D Mt. Royal |
| 4 | Daily | Troy Hill | Downtown, North Shore, Allegheny Center, East Allegheny, Troy Hill, Reserve, Summer Hill | | Formerly 6A Troy Hill |
| 6 | Daily | Spring Hill | Downtown, North Shore, Allegheny Center, East Allegheny, Spring Hill, City View, Northview Heights, Summer Hill | | Formerly 6B Spring Hill |
| 7 | Peak | Spring Garden | Downtown, North Side, Allegheny Center, East Allegheny, Spring Garden, Reserve, Summer Hill | | Formerly 6C Spring Garden |
| 8 | Daily | Perrysville | Downtown, North Shore, Allegheny Center, Central Northside, Perry South, Observatory Hill, West View | | Formerly 11D Perrysville Avenue |
| 11 | Daily | Fineview | Downtown, North Shore, Allegheny Center, Central Northside, Fineview, Perry South | | Formerly 11E Fineview |
| 12 | Daily | McKnight | Downtown, North Shore, Allegheny Center, East Allegheny, East Street Valley, Ross, McCandless | | Formerly 12A North Hills Shopper |
| 13 | Daily | Bellevue | Downtown, North Shore, Allegheny Center, Mexican War Streets, Calbride Place, Marshall-Shadeland, Brighton Heights, Bellevue, Ross, West View | | Formerly 500 Highland Park-Bellevue |
| 14 | Daily | Ohio Valley | North Shore, Manchester, Bellevue, Avalon, Ben Avon, Emsworth, Glenfield, Haysville, Osborne, Sewickley, Edgeworth, Leetsdale, Ambridge | | Formerly 16A Ohio River Boulevard |
| 15 | Daily | Charles | Downtown, North Shore, Allegheny Center, Mexican War Streets, Charles Street Valley, Perry South, Northview Heights, Summer Hill | | Formerly 16F City View |
| 16 | Daily | Brighton | Downtown, North Shore, Allegheny Center, Mexican War Streets, Calbride Place, Marshall-Shadeland, Brighton Heights, Bellevue, Avalon | | Formerly 16B Brighton |
| 17 | Daily | Shadeland | Downtown, North Shore, East Allegheny, Mexican War Streets, Manchester, Marshall-Shadeland, Brighton Heights, Ross | | Formerly 17B Avalon-Shadeland and 18B Avalon-Shadeland Ave Express |
| 18 | Peak | Manchester | North Shore, Allegheny West, Manchester | | Formerly 16D Manchester |
| 19L | Peak | Emsworth Limited | Downtown, Bellevue, Avalon, Ben Avon, Emsworth | | Formerly B Bellevue Flyer |
| 20 | Daily | Kennedy | Downtown, Esplen, McKees Rocks, Kennedy | | Formerly 21B Kenmawr, 21C West Park, 21F Presston-Kenmawr |
| 21 | Daily | Coraopolis | Downtown, Esplen, McKees Rocks, Stowe, Neville Island, Coraopolis, Sewickley, Moon Township | | Formerly 21A Coraopolis |
| 22 | Daily | McCoy | Downtown, Esplen, McKees Rocks, Stowe, Pleasant Ridge, Kennedy | | Formerly 21B Kenmawr, 21F Preston-Kenmawr |
| 24 | Daily | West Park | Downtown, Esplen, McKees Rocks, Stowe, Kennedy | | Formerly 21C West Park and 21D West Park-Kennedy |
| 26 | Daily | Chartiers | Downtown, West End, Elliott, Sheraden, Allendale Circle, Ingram | | Formerly 26A Ingram-Sheraden and 26D Chartiers City |
| 27 | Daily | Fairywood | Downtown, West End, Elliott, Crafton Heights, Windgap, Fairywood, Ingram | | Formerly 26B Fairywood (Formerly route name Broadhead Manor) |
| 29 | Daily | Robinson | East Busway Penn Station, Downtown, West End, Elliott, Crafton Heights, Ingram, Robinson, North Fayette, Pittsburgh Technical Institute | | Formerly 26E Robinson Imperial and 28E Robinson Express |
| 30 | Monday-Saturday | Airport Corridor | Summit Ridge, Ikea, Mall at Robinson, Settlers Ridge | Micro transit route operated by Pittsburgh Transportation Group; through special arrangement by Airport Corridor Transportation Association | |
| 31 | Daily | Bridgeville | East Busway Penn Station, Downtown, West End, Westwood, Oakwood, East Carnegie, Carnegie, Heidelberg, Collier, Bridgeville | | Formerly 31D Bridgeville via Washington Avenue and 31E Bridgeville via Main Street |
| 32 | Monday-Friday | Campbells Run | Campbells Run Road, Settlers Ridge | Micro transit route operated by Pittsburgh Transportation Group; through special arrangement by Airport Corridor Transportation Association | |
| 36 | Daily | Banksville | Downtown, Bankville, Dormont, Mt. Lebanon, Bethel Park, South Hills Village | | Formerly 36A Banksville |
| 38 | Daily | Green Tree | Downtown, Parkway Center, Green Tree, Scott, Mt. Lebanon, Collier | | Formerly 38C Green Tree |
| 39 | Daily | Brookline | Downtown, Station Square, Brookline | Sunday service added 11/22/20 | Formerly 41D Brookline |
| 40 | Daily | Mt. Washington | Downtown, Station Square, Mount Washington, Duquesne Heights | | Formerly 41E Mount Washington |
| 41 | Daily | Bower Hill | Downtown, Station Square, West Liberty Avenue, Dormont, Mt. Lebanon, Scott Township, Bridgeville | | Formerly 41B Bower Hill |
| 43 | Daily | Bailey | Downtown, Station Square, Allentown, Mt. Washington | | Formerly 43E Mount Washington Express |
| 44 | Daily | Knoxville | Downtown, Station Square, Beltzhoover, Knoxville, Mt. Oliver, St. Clair | Weekday extension to Baldwin Borough | Formerly 46K Knoxville and 51G Mount Oliver |
| 48 | Daily | Arlington | Downtown, Station Square, South Side, South Side Works, South Side Slopes, Arlington, Allentown, Beltzhoover | | Formerly 51A Arlington Heights |
| 51 | Daily | Carrick | Downtown, Station Square, South Side, South Side Slopes, Mount Oliver, Bon Air, Carrick, Brentwood, Whitehall, Baldwin, West Mifflin | | Formerly 51C Carrick |
| 51L | Peak | Carrick Limited | Downtown, Station Square, Mount Oliver, Bon Air, Carrick, Brentwood | | Formerly 53C Carrick Express |
| 52L | Peak | Homeville Limited | Downtown, South Oakland, Greenfield, Homestead, Munhall, Homeville, West Mifflin, Duquesne | | Formerly 53H Homestead-Duquesne |
| 53 | Sunday Service has been added | Homestead Park | The Waterfront, Homestead, Munhall, Lincoln Place, West Mifflin, Century Square | | Formerly 53F Homestead-Lincoln Place |
| 53L | On/Off Peak | Homestead Park Limited | Downtown, Greenfield, Homestead, Munhall, Lincoln Place, West Mifflin, Century Square | | |
| 54 | Daily | North Side-Oakland-South Side | Allegheny Station, Allegheny Center, Mexican War Streets, East Allegheny, Strip District, Polish Hill, Lawrenceville, Bloomfield, North Oakland, Oakland, South Side, Mount Oliver, Knoxville, Beltzhoover, Allentown, South Hills Junction, Bon Air | One route with 2 branches: 54C Allegheny to Knoxville, 54D Allegheny to Bon Air. Both branches serve Allegheny Station | Formerly 54C North Side-Oakland-South Side |
| 55 | Daily | Glassport | Century Square, West Mifflin Wal-Mart, Southland Shopping Center, CCAC South, Jefferson Regional Medical Center, Clairton, Glassport, McKeesport, UPMC McKeesport, Port Perry, Great Valley Shopping Center, North Versailles Wal-Mart | | Formerly 55M McKeesport |
| 56 | Daily | Lincoln Place | Downtown, Technology Center, The Run, Hazelwood, Glenwood, Hays, Lincoln Place, West Mifflin, Dravosburg, McKeesport, Penn State | | Formerly 56C McKeesport-Lincoln Place |
| 57 | Daily | Hazelwood | Downtown, Technology Center, The Run, Hazelwood, Glenwood, Glen Hazel, The Waterfront | | Formerly 56B Hazelwood |
| 58 | Daily | Greenfield | Downtown, Technology Center, The Run, Greenfield, South Oakland, Oakland | | Formerly 56E Greenfield |
| 59 | Daily | Mon Valley | North Versailles, Turtle Creek, East Pittsburgh, Forest Hills, Braddock Hills, North Braddock, Braddock, Swissvale, Rankin, Munhall, The Waterfront, Homestead, Whitaker, Duquesne, McKeesport, Dravosburg, West Mifflin | | Formerly 55E Whitaker-West Mifllin and 55W Duquesne Annex |
| 60 | Daily | Walnut-Crawford Village | Crawford Village, McKeesport, Versailles | | Formerly 60A Walnut-Avondale, 60K Crawford Village |
| 61A | Daily | North Braddock | Downtown, Uptown, Soho, Oakland, Squirrel Hill, Wilkinsburg, Edgewood, Swissvale, North Braddock, Braddock | Rerouted via Bell and Jones Ave in North Braddock to Braddock Avenue and Woodlawn Terminus, East Pittsburgh routing has been discontinued | Formerly route name 61A East Pittsburgh-Wilkinsburg |
| 61B | Daily | Braddock-Swissvale | Downtown, Uptown, Soho, Oakland, Squirrel Hill, Regent Square, Swissvale, Rankin, Braddock | Rerouted via Braddock Avenue to Woodlawn Terminus in Braddock Swissvale Station routing has been discontinued due to re-established 61A service via Swissvale | |
| 61C | Daily | McKeesport-Homestead | Downtown, Uptown, Soho, Oakland, Squirrel Hill, Greenfield, Homestead, Munhall, West Mifflin, Kennywood Park, Duquesne, McKeesport | | |
| 61D | Daily | Murray Short | Oakland, Squirrel Hill, Greenfield, The Waterfront | Some PM peak short-turn service between Oakland and Greenfield | Formerly called 61D Summerset & 61D Murrary. Renamed the 61D Murray Short on October 1, 2023 and no longer services downtown or uptown. |
| 62 | Weekdays | McKeesport-North Versailles | Port Vue, Liberty, McKeesport, White Oak, North Versailles | Operated by Heritage Community Initiatives | |
| 63 | Weekdays | East Pittsburgh | North Versailles, East Pittsburgh, Turtle Creek, Wilkins | Operated by Heritage Community Initiatives | |
| 64 | Daily | Lawrenceville-Waterfront | Lawrenceville, Bloomfield, Shadyside, Squirrel Hill, Greenfield, The Waterfront | | Formerly 64A East Liberty-Homestead |
| 65 | Peak | Squirrel Hill | Downtown, South Oakland, Squirrel Hill | | Formerly 67H Squirrel Hill |
| 67 | Daily | Monroeville | Downtown, Uptown, Soho, Oakland, Squirrel Hill, Point Breeze, Wilkinsburg, Churchill, Wilkins, Monroeville, CCAC Boyce | Only serves Monroeville Mall, Penn Center East, Churchill, Beacon Hill, Wilkinsburg, Point Breeze, Squirrel Hill, Oakland, Uptown and Downtown on Weekends and Holidays | Formerly 67A Monroeville |
| 69 | Daily | Trafford | Downtown, Uptown, Soho, Oakland, Squirrel Hill, Point Breeze, Wilkinsburg, Forest Hills, Wilkinsburg, Forest Hills, Chalfant, East Pittsburgh, Turtle Creek, Wilmerding, Pitcairn, Trafford | Runs weekdays between downtown Pittsburgh and Trafford and weekends/holidays between Wilkinsburg and Trafford | Formerly 67F Trafford |
| 70 | Weekdays | Pitcarin-Monroeville/Pitcarin-North Versailles | North Versailles, Wilmerding, Wall, Pitcarin, Monroeville | Operated by Heritage Community Initiatives | |
| 71 | Weekdays | Edgewood Town Center | Wilkinsburg, Regent Square, Swissvale, Swisshelm Park, Rankin, Hawkins Village | | Formerly 79A Edgewood Town Center |
| 71A | Daily | Negley Short | Oakland, North Oakland, Shadyside, Friendship, East Liberty, Highland Park | | Formerly the 71A Negley, renamed the 71A Negley Short on October 1, 2023 and no longer services downtown or uptown. |
| 71B | Daily | Highland Park | Downtown, Uptown, Soho, Oakland, Shadyside, East Liberty, Highland Park | | Formerly 500 Highland Park-Bellevue |
| 71C | Daily | Point Breeze Short | Oakland, North Oakland, Shadyside, Friendship, East Liberty, Bakery Square, Point Breeze, Wilkinsburg | Shadyside service along Ellsworth Avenue replaced by 75 Ellsworth | Formerly the 71C Point Breeze, renamed the 71C Point Breeze Short on October 1, 2023 and no longer services downtown or uptown. |
| 71D | Daily | Hamilton Short | Oakland, Shadyside, Point Breeze, Homewood, Brushton, Wilkinsburg | Wilkinsburg service discontinued along South and Swissvale Avenues, Jane Street Loop, Coal Street, Franklin Avenue & Wood Street between Franklin & Wallace Avenues, along with Tioga and Rosedale Streets | Formerly the 71D Hamilton, renamed the 71D Hamilton Short on October 1, 2023 and no longer services downtown or uptown. |
| 74 | Daily | Homewood-Squirrel Hill | East Liberty, Larimer, Lincoln-Lemington, Belmar Gardens, Homewood, Point Breeze, Squirrel Hill | | Formerly 74A Homewood-Squirrel Hill |
| 75 | Daily | Ellsworth | South Side Works, Oakland, Shadyside, East Liberty, Bakery Square, Larimer, Highland Park, Morningside, Aspinwall, Waterworks Mall, O'Hara | | Formerly 59U South Side Works-Oakland-Waterfront, 94B Larimer Avenue |
| 77 | Daily | Penn Hills | Downtown, Polish Hill, Baum Boulevard, East Liberty, Larimer, Homewood, Brushton, Eastwood, Penn Hills, North Bessemer, Universal, Plum, CCAC Boyce | This route has two branches—77L via Leechburg and 77S via Saltsburg—on weekdays. All service operates between Downtown and Alcoma Apartments on weekends. | Formerly 77B Penn Hills |
| 79 | Daily | East Hills | Wilkinsburg, East Hills | | Formerly 79D Mount Carmel |
| 81 | Daily | Oak Hill | Downtown, Crawford Square, Hill District, Skyline Terrace, Oak Hill, Oakland, South Side | | Formerly 81A Oak Hill |
| 82 | Daily | Lincoln | Downtown, Crawford Square, Hill District, North Oakland, Shadyside, East Liberty, Larimer, Lincoln-Lemington | | Formerly 81B Lincoln |
| 83 | Daily | Bedford Hill | Downtown, Crawford Square, Hill District, Bedford Hill, Sugartop, VA Hospital, Oakland, South Side | | Formerly 81C Webster |
| 86 | Daily | Liberty | Downtown, Strip District, Bloomfield, Shadyside, East Liberty, Larimer, Homewood, Brushton, Wilkinsburg | | Formerly 86A East Hills |
| 87 | Daily | Friendship | Downtown, Strip District, Bloomfield, Friendship, East Liberty, Highland Park, Morningside, Stanton Heights, Lawrenceville | This route has two branches: to Morningside (weekdays only) and to Stanton Heights (7 days a week) | Formerly 77F Morningside-Friendship and 77G Stanton Heights-Friendship |
| 88 | Daily | Penn | Downtown, Strip District, Lawrenceville, Bloomfield, Garfield, Friendship, East Liberty, Bakery Square, North Point Breeze | | Formerly 86B Frankstown |
| 89 | Daily | Garfield Commons | North Point Breeze, Bakery Square, East Liberty, Larimer, Garfield Commons, Garfield | | Formerly 89A Garfield Heights |
| 91 | Daily | Butler Street | Downtown, Strip District, Lawrenceville, Sharpsburg, Aspinwall, Waterworks Mall, O'Hara, VA Hospital | | Formerly 91A Butler Street |
| 93 | Daily | Lawrenceville-Hazelwood | Lawrenceville, Children's Hospital, Bloomfield, North Oakland, Oakland, South Oakland, Schenley Park, Greenfield, Hazelwood, Glen Hazel | weekend service added 11/22/20 | Formerly 56U Oakland-Greenfield |

### Flyer routes

| Route number | Route name | Service area | Notes | Changes |
| 28X | Airport Flyer | North Point Breeze, Shadyside, Oakland, Uptown, Downtown, Robinson, Pittsburgh International Airport via West Busway | Pickup only on West Busway stops. | Service has been extended 3:17am–1:03am |
| G2 | West Busway | Downtown, Sheraden, Ingram, Crafton, Carnegie via West Busway | | Formerly 100 West Busway-Oakland |
| G3 | Moon Flyer | Downtown, Moon via West Busway | Pickup only on West Busway. | Formerly 28K Moon Express |
| G31 | Bridgeville Flyer | Downtown, Carnegie, Heidelberg, Collier, Bridgeville, South Fayette via West Busway | Pickup only on West Busway. | Formerly 33D Bridgeville-Washington Flyer and 33E Bridgeville-Main Street Flyer |
| G32 | Campbells Run Flyer | Carnegie, Campbells Run Road, Settlers Ridge | Micro transit route operated by Pittsburgh Transportation Group; through special arrangement by Airport Corridor Transportation Association | |
| O1 | Ross Flyer | Downtown, Ross Park & Ride via I-279 HOV Lane | | formerly 13X Ross Park Ride |
| O5 | Thompson Run Flyer | Downtown, Ross, McCandless via I-279 HOV Lane | | Formerly 13G Thompson Run Express |
| O12 | McKnight Flyer | Downtown, Ross, McCandless via I-279 HOV Lane | | Formerly 13A North Hills Express |
| P1 | East Busway All Stops | Downtown, Polish Hill, Shadyside, East Liberty, Homewood, Wilkinsburg, Swissvale via East Busway | | Formerly EBA East Busway All Stops |
| P3 | East Busway-Oakland | Oakland, North Oakland, Shadyside, East Liberty, Homewood, Wilkinsburg, Swissvale via East Busway | | Formerly EBO East Busway-Oakland |
| P7 | McKeesport Flyer | Downtown, Edgewood, Swissvale, Rankin, West Mifflin, Duquesne, McKeesport via East Busway | | Formerly 58C McKeesport Express, 58P Port Vue Express and 58V Versailles Express |
| P10 | Allegheny Valley Flyer | Downtown, RIDC Park East, Springdale, Creighton, Tarentum, Brackenridge, Harrison via East Busway | | Formerly AV Allegheny Valley Flyer |
| P12 | Holiday Park Flyer | Downtown, Monroeville, Plum via East Busway | | Formerly HP Holiday Park Flyer |
| P13 | Mount Royal Flyer | Downtown, Etna, Shaler, McCandless | The only "P" branded route that does not use the MLK East Busway | Formerly R Mount Royal Flyer |
| P16 | Penn Hills Flyer | Downtown, Wilkinsburg, Blackridge, Churchill Valley, Penn Hills, North Bessemer, Universal, Plum via East Busway | Two branches—Universal Branch via East Vue and Universal Road; Leechburg Branch via Leechburg | Formerly P Penn Hills-Hunter Park Flyer, PG Penn Hills-Universal Flyer, 78E Penn Hills-East Vue Express |
| P17 | Lincoln Park Flyer | Downtown, Larimer, Lincoln-Lemington, Lincoln Park, Eastwood via East Busway | Wilkinsburg Station service extension October 1, 2023 | Formerly LP Lincoln Flyer |
| P67 | Monroeville Flyer | Downtown, Wilkins, Monroeville Mall Park & Ride via East Busway | | Formerly 68A Monroeville Express |
| P68 | Braddock Hills Flyer | Downtown, Wilkinsburg, Braddock Hills, North Braddock, East Pittsburgh, Turtle Creek, Monroeville via East Busway | 68 Braddock Hills discontinued runs 7 days a week. Service extended to Forbes Hospital in 2023 | Formerly 68D Braddock Hills Express |
| P69 | Trafford Flyer | Downtown, Wilkinsburg, Braddock Hills, North Braddock, East Pittsburgh, Turtle Creek, Monroeville via East Busway | | Formerly 68F Trafford Express |
| P71 | Swissvale Flyer | Downtown, Wilkinsburg, Regent Square, Swisshelm Park, Swissvale via East Busway | Downtown extension of Route 71 Edgewood Town Center during weekday peak periods | Formerly 68G Swissvale Park Express |
| P76 | Lincoln Highway Flyer | Downtown, Wilkinsburg, Forest Hills, Chalfant, East Pittsburgh, North Versailles, East McKeesport, White Oak, Versailles via East Busway | | Formerly 68J Lincoln Highway Express |
| P78 | Oakmont Flyer | Downtown, Wilkinsburg, Blackridge, Penn Hills, Rosedale, Verona, Oakmont, Harmar via East Busway | | Formerly 78A Oakmont Express |
| Y1 | Large Flyer | Downtown, Brentwood, Whitehall, Baldwin, Pleasant Hills, Jefferson via South Busway | | Formerly E Elizabeth Flyer |
| Y45 | Baldwin Manor Flyer | Downtown, Brookline, Overbrook, Whitehall, Baldwin, South Park Township via South Busway | | Formerly BM Baldwin Manor Flyer and 46B Baldwin Manor |
| Y46 | Elizabeth Flyer | Downtown, Brookline, Overbrook, Brentwood, Whitehall, Baldwin, Pleasant Hills, Jefferson, Clairton, Elizabeth via South Busway | | Formerly 46G Elizabeth |
| Y47 | Curry Flyer | Downtown, Brookline, Overbrook, Whitehall, Pleasant Hills, West Mifflin via South Busway | | Formerly 46D Curry |
| Y49 | Prospect Park Flyer | Downtown, Brookline, Overbrook, Brentwood, Whitehall, Baldwin, West Mifflin, CCAC South via South Busway | | Formerly 46F Baldwin Highlands |

## Eliminated services
### Discontinued routes

Bus routes that are discontinued from the lineup and integrated into other one or more route(s) throughout PAT's history include:
| Route number | Route name | Replaced by |
| 1B | Saxonburg Boulevard | D Middle Road Flyer |
| 1C | Middle Road | D Middle Road Flyer |
| 1E | Etna |
| 1F/3 | Millvale | |
| 3A | New Kensington Express | |
| 3L | Creighton-Lower Burrell Express | P10 Allegheny Valley Flyer (no bus service in Lower Burrell) |
| 3M | Tarentum-Natrona Express | P10 Allegheny Valley Flyer |
| 4A | 40th Street Bridge | |
| 4B | Blawnox | |
| 4E | Millvale Loop/Skating Rink | Ran from November 6, 1964 to March 1965. |
| 5A/5 | Natrona-Argonne Drive/Natrona | |
| 5B | Natrona-Spring Hill Road | Discontinued March 25, 2001 |
| 5C | Natrona Heights-Brackenridge | |
| 5D | Valley Camp | Discontinued December 13, 1970. |
| 5E | Schafers | |
| 5F | Valley Heights | |
| 5G | Aluminum City Terrace | |
| 5H | Braeburn | |
| 5J | Marlborough Drive | Discontinued December 14, 1970. |
| 5K | Culmerville-New Kensington | |
| 5M | Culmerville-Tarentum | |
| 5N | Indianola | Ran from February 25, 1974 to August 30, 1974. |
| 5N | New Kensington Bridge | Temporary shuttle from May 1, 1989 to September 1, 1989. |
| 6D | Spring Looper | 7 Spring Garden |
| 11A | McKnight | 12A North Hills Shopper, 13C Perry Highway Express |
| 11B | Evergreen | |
| 11C/9 | Perry Highway | |
| 11F | West View | |
| 11G | Thompson Run | |
| 13B | Babcock Express | 12A North Hills Shopper, 13A North Hills Express, O5 Thompson Run Flyer |
| 13C | Perry Highway Express | 9 Perry Highway, 13X Ross Park and Ride |
| 13D | Perrysville Express | 6B Spring Hill, 11D Perrysville, 16F City View |
| 13F | West View Express | 8 Perrysville, 13X Ross Park and Ride, 500 Highland Park-Bellevue |
| 13H | Rochester Road Express | 13J Franklin Park |
| 13J | Franklin Park Express | |
| 13K | Warrendale, Cranberry | Operated by Port Authority until 2011, then Lenzner Coach Lines until 2022. |
| 13S | Ross Park and Ride (special route) | |
| 13U/O4 | North Hills Express/North Hills-Oakland Flyer | |
| 14C | Bryant School Run Road Express | 13J Franklin Park |
| 15A | North Hills Shuttle | |
| 16B | Emsworth to High Bridge | Renamed 16B Brighton (now 16 Brighton) on April 30, 1966. |
| 16C | Bellevue-West View | 500 Highland Park-Bellevue; resurrected as 13 Bellevue when the 500 was split. |
| 16E | Reedsdale | Discontinued July 26, 1982 due to duplication with other routes. |
| 16F | Charles Street | Discontinued October 22, 1966. |
| 16G | Charles Street | Temporary route that ran from April 17, 1988 to December 12, 1988. |
| 16U | North Shore | 501 North Shore-Downtown-Oakland |
| 18A | Aliquippa Express | |
| 18C | Bellevue-Union Avenue Express | 14 Ohio River Valley, 19L Emsworth Limited, 500 Highland Park-Bellevue |
| 18E | Manchester Express | |
| 19A | Bellevue-Avalon | Discontinued September 2, 1969. |
| 19B | Manchester-Evergreen | Discontinued February 7, 1977. |
| 19C | City View | Renamed 16F City View on September 2, 1979. |
| 20A | Ben Avon Heights | Discontinued 1970. |
| 24A | Crafton-Presston | Discontinued 2010. |
| 24B | McKees Rocks Bridge | Discontinued 1972. |
| 25A | Sewickley-Groveton | Merged with 21A Coraopolis on December 8, 1968. |
| 25/25A | Moon/Robinson-Moon-Coraopolis | Discontinued 2011. |
| 25B | Broadhead Road | |
| 25C | Coraopolis-Sharon Hill Manor | Discontinued by 1968. |
| 25C | Hankey Farms | |
| 25D | Robinson-Carnegie | |
| 26C | Ingram via Steuben Street | Replaced by 26B & 100 when West Busway opened in 2000 |
| 26D | Chartiers City | 26 Chartiers (Allendale/Sheraden/Elliot) & 27 Fairywood (Chartiers City and Windgap) |
| 26E | Robinson | 29 Robinson |
| 26F | Moon Run-Forest Grove via West End | 28F Forest Grove Express |
| 26U | Robinson-Oakland | 26E Robinson |
| 28A | Wings Over Pittsburgh | Special Service for Airshows |
| 28B | Berry Street Express | 26B Fairywood |
| 28E | Robinson Express | 29 Robinson |
| 28F | Forest Grove Express | |
| 28G | Oakdale Express | |
| 28J | Settlers Ridge Express | Temporary Park and Ride Route for Closure of Fort Pitt Tunnels in early 2000s |
| 28K | Moon Express | G3 Moon Flyer |
| 28M/32 | Campbells Run | |
| 28S | Moon-West Busway (special route) | |
| 29A | Thornburg | Discontinued in 1965. |
| 29E | Millers Run | 31 Bridgeville, G31 Bridgeville Flyer |
| 30A | West End Shuttle | Ran from November 28, 1989 to May 31, 1990. |
| 31A | Carnegie-Crafton | Route became redundant with opening of West Busway |
| 31B | Crafton-Heidelberg | |
| 31C | Crafton-Ingram | |
| 31F | Pittsburgh-Carnegie | |
| 32G | Carnegie-Craftmont | Discontinued in 1965. |
| 33X/G1 | West Busway-All Stops/West Busway-Robinson | |
| 33F | McDonald | |
| 34B | Mt. Washington-North Side | Discontinued August 30, 1981. |
| 34C | Warrington-Grandview | |
| 35A | Rosslyn Heights | |
| 35A | South Park-Baldwin-Whitehall | Y47 Curry Flyer, Y49 Prospect Flyer |
| 35B | Rosslyn Farms | |
| 35C | Wabash Hill | |
| 35D | Cubbage Hill | |
| 35E | Campbells Run | |
| 36B | Virginia Manor | |
| 36C | Greentree/Ridgemont | |
| 36D/37 | Westwood/Ridgemont | |
| 37 | Castle Shannon Shuttle | Temporary route while Red Line was under construction (June 16-August 31, 2024) |
| 37A | Mt. Lebanon-McFarland |
| 37D | Dormont Station | Temporary route while Beechview Line (current Red Line) was under construction |
| 38A | Airport Express | Became A Airport Red Flyer on November 18, 1973 |
| 38B | Carnegie Express | |
| 41A | Pioneer Avenue | 41D Brookline, 41G Dormont |
| 41B | Mt. Lebanon | |
| 41B | Bower Hill | 41 Bower Hill |
| 41C | Cedar Boulevard | 36 Banksville |
| 41F | McNeilly | 41A Pioneer/41D Brookline (03/27/11 - 39 Brookline) |
| 41G/35 | Dormont-Rolling Hills/Sunset Hills | Partially replaced by 35 Sunset Hills south of Dormont station |
| 42 | Dormont | Mount Lebanon Station, Dormont, Brookline, South Busway, Station Square, Downtown |
| 42 | Potomac Shuttle | Temporary route while Red Line was under construction (June 16-August 31, 2024) |
| 42C | Castle Shannon ONLY via Beechview | Red Line |
| 42F | Broadway | Temporary rail shuttle for Red Line (42 series) |
| 42L | Library via Beechview | 47L Library via Overbrook Light Rail route (Not the bookmoblie) |
| 44A | Shadycrest | Discontinued on August 24, 1985. |
| 44B | Sunset | Discontinued on November 21, 1982. |
| 44C | Duquesne Heights | Discontinued on September 3, 1966. |
| 44D | Jefferson | |
| 44E | Inglewood | Discontinued on February 19, 1983. |
| 44F | Mt. Lebanon-Oakland | Converted to U-Bus service and renamed 44U Mt. Lebanon-Oakland on September 3, 1973. |
| 44F | Terrace | |
| 44L | Library Short | |
| 44S | Castle Shannon-Beechview | Temporary Rail Car Shuttle |
| 44U/42 | Mt. Lebanon-Oakland | |
| 45A | Heidelberg-Kane Hospital | Discontinued in 1966. |
| 46A | Brentwood | 51 Carrick, Y45 Baldwin Manor Flyer |
| 46C | Ruthfred Acres | Discontinued on September 3, 1966. |
| 46E | East Brookline | Converted to EB East Brookline Red Flyer on February 20, 1977. |
| 46H | Pleasant Hills | Y1 Large Flyer, Y46 Elizabeth Flyer |
| 46S | Castle Shannon-Overbrook | Temporary route used while Overbrook (Blue Line) Trolley Line was down, 1993(c) to 2006(c). First began as 49S Shannon-Overbrook. |
| 47D | Drake | Discontinued on September 4, 1999. |
| 48G | Pittsburgh-Clairton Express | |
| 49C | Washington Road-Whitehall | Discontinued on November 20, 1982. |
| 49D | Drake-South Park Road | 49C Washington Road-Whitehall |
| 49G | Piney Forks Village-Library Loop | Ran from September 15, 1975 to April 18, 1976. |
| 49H | Gill Hall | Ran from September 6, 1966 to November 5, 1966. |
| 50A | Colonial Village-Wilson Newtown | Merged with the then-50B Glassport on June 15, 1968 |
| 50B | Glassport-Clairton | |
| 50C | West Elizabeth-Monongahela | |
| 50D | Glassport-Elizabeth | |
| 50E | Clairton-Irvin Works | |
| 50F | Clairton-South Park | |
| 50G | Riverview Circle | Discontinued on November 22, 1969. |
| 50H | Elizabeth-Blaine Hill | |
| 50J | McKeesport-South Park | |
| 51B/50 | Spencer | |
| 51C | Brentwood Villa | Discontinued on July 31, 1965 due to duplication. |
| 51D | Churchview | 50 Spencer |
| 51E | Pittsburgh-Clairton via Rt 885 or Irvin Works | |
| 51F | Duquesne via South Side | |
| 51S | South Side-Century III-Large (special route) | |
| 53F | Homestead-Lincoln Place Express | 53 Homestead Park and 53L Homestead Park Limited |
| 53H | Homeville-Duquesne | 52 Homeville and 52L Homeville Limited |
| 54A | Arlington Heights | |
| 54B | Arlington-South Hills | Discontinued on February 20, 1977 due to redundancy with 46K and 54A. |
| 54D | Bon Air | Discontinued on February 8, 1970. |
| 54E | P&LE Transfer | Discontinued on July 15, 1968. |
| 55B/52 | Homeville | |
| 55C | Whitaker | |
| 55D | West Run-Brierly Lane | |
| 55E | Whitaker-West Mifflin | 59 Mon Valley |
| 55F | New Homestead-Calhoun Village | |
| 55G | Terrace | |
| 55H | Homestead-Duquesne | |
| 55J | McKeesport-Duquesne | |
| 55K | Kennedy-Crawford | |
| 55M/55 | Century III Mall/Jefferson | 55 Jefferson eliminated during service cuts; later restored as 55 Glassport |
| 55P | Duquesne-Irvin Works | Discontinued on November 22, 1982. |
| 55T | Homestead-Continental Can. | |
| 55U | Homestead-South Park | |
| 55V | Homestead-Irvin Works | |
| 56U | Greenfield | 58 Greenfield |
| 58C | McKeesport | P7 McKeesport Flyer |
| 58P | Port Vue-Liberty Express | P7 McKeesport Flyer |
| 58V | Versailles Express | P7 McKeesport Flyer |
| 59A | Homeville | Ran from March 1, 1964 to March 5, 1964. |
| 59B | Glen Hazel | |
| 59U | South Side Works-Oakland-Waterfront | 75 Ellsworth (South Side-Oakland) & 61D Murray (Oakland-Waterfront) |
| 60A | Walnut-Avondale | Walnut-Crawford Village |
| 60B | Jenny Lind | 61 White Oak |
| 60C | Grandview | 60E White Oak-Grandview |
| 60D | Bryn Mawr | |
| 60D | Lincoln School | |
| 60E/61 | White Oak-Grandview/White Oak | |
| 60F | Johnston's Greenhouse | |
| 60G | Fairhaven Heights | |
| 60H | Blythdale | |
| 60J | Blythdale-Grennock Heights | |
| 60K | Crawford Village | 60 Walnut-Crawford Village |
| 60M | McKeesport-East Pittsburgh | 62 Liberty-North Versailles |
| 60N | East Pittsburgh-Turtle Creek | Redesignated as 65N East Pittsburgh-Turtle Creek on February 18, 1984. |
| 60P/62 | Port Vue-Liberty/Liberty-North Versailles | |
| 60S | Crawford Village-Jenny Lind | 60 Walnut-Crawford Village |
| 60T | Wilmerding-McKeesport | |
| 60U | Liberty | |
| 60V | Evans Avenue | Planned but never ran; instead merged into 60C/60E |
| 60W | Liberty-Lincoln-Elizabeth Township | Merged into the 60U on November 6, 1976. |
| 60W | Central Highlands | |
| 61F | Homestead Park | 53 Homestead Park |
| 63A | North Braddock Express | |
| 63B | Rankin Express | P71 Swissvale Flyer |
| 64 | East Pittsburgh-Wilkinsburg | Converted to bus and became 61A East Pittsburgh-Wilkinsburg on January 29, 1967. |
| 65A | East Pittsburgh-Monroeville | |
| 65B | East Pittsburgh-Crescent Hill | |
| 65C | Braddock-Wilkinsburg | Discontinued on September 7, 1970 and replaced by 65G rerouting and 68D extension. |
| 65D | Braddock-Forest Hills-Braddock Hills | Discontinued on November 19, 1977. |
| 65E | North Braddock-Swissvale | |
| 65F | Bessemer Terrace | Discontinued on September 7, 1970. |
| 65G | Corey Avenue/Linhart-Braddock | Merged with 65H and 65K to form 65G Linhart-Braddock-East Pittsburgh on September 5, 1965. |
| 65G | Linhart-Braddock-East Pittsburgh | |
| 65H | East Pittsburgh-Park View | Merged into the 65G on September 5, 1965. |
| 65J | Braddock-Forest Hills | |
| 65K | Braddock-Bessemer Terrace | Merged into the 65G on September 5, 1965. |
| 65M | Corey Avenue | Merged with the 65N to form the 65G in mid-1964. |
| 65N | Library Street | Merged with the 65M to form the 65G in mid-1964. |
| 65N | East Pittsburgh-Turtle Creek | |
| 67 | Braddock-Swissvale | Converted to bus and became 61B Braddock-Swissvale on January 29, 1967. |
| 67C | Laketon Road | |
| 67E | Greensburg Pike | |
| 67J | McKeesport via Blvd of the Allies | Discontinued on September 8, 1964. |
| 67J | Lincoln Highway | |
| 68 | Braddock Hills | P68 Braddock Hills Flyer |
| 68B | Blackridge-Laketon | |
| 68S | Monroeville-East Busway (special route) | |
| 69A | Swisshelm Park | Discontinued on November 5, 1972. |
| 69A | Forbes | 61A East Pittsburgh-Wilkinsburg |
| 69B | Atwood Street | Merged into the 84A on January 14, 1967. |
| 69C | Regent Square | Merged into the 79A and 79B on July 1, 1979. |
| 70A | Trafford-Jeanette | |
| 70B | Wilmerding-Monroeville | |
| 70C | Wilmerding-East Pittsburgh | |
| 70D | Wilmerding-Wall | |
| 71B | Hamilton | 500 Highland Park-Bellevue; resurrected as 71B Highland Park when the 500 was split. |
| 73B | Highland Park Express | 93A Aspinwall-Cheswick Express |
| 74B | Marcy State Hospital | |
| 74B | Highland Park | |
| 75A/70 | Monroeville Shopper | |
| 75B/72 | Monroeville-North Versailles/Monroeville-Pitcairn | |
| 75D | Penn Hills-Monroeville | |
| 77A/78 | Oakmont | P78 Oakmont Flyer |
| 77C | Shadyside | W Wilkins Avenue Flyer |
| 77D | Highland-Friendship | 87 Friendship |
| 77U | Shadyside | |
| 78C | Shadyside Express | W Wilkins Avenue Flyer |
| 78E | Penn Hills-East Vue Express | P16 Penn Hills flyer |
| 79B | Wilkinsburg-Penn Hills | |
| 79C | Maplewood | Discontinued in 1975. |
| 83B | Lincoln Avenue Express | LP Lincoln Park Flyer |
| 84A | Herron Hill-Oakland | 81 Oak Hill, 83 Bedford Hill |
| 84B | Herron | Replaced by rerouted 54C North Side-Oakland-South Side in 1968 or 1969. |
| 84B | Oakland Loop | |
| 84C | Hill Loop | 81 Oak Hill, 83 Bedford Hill |
| 88A | East Hills Express | |
| 89C | Homewood North | Trial route that ran from January 7, 1973 to February 19, 1977. |
| 91S | Sharps Hill | |
| 93A | Aspinwall-Cheswick Express | P10 Allegheny Valley Flyer |
| 94A | Stanton Heights | 87 Friendship |
| 94B | Morningside | 87 Friendship |
| 94C | Paulson Avenue | 74 Homewood-Squirrel Hill |
| 96A | Golden Triangle | Discontinued on July 7, 1985. |
| 98D | Strip District (special route) | |
| 98F | Grant Street-First Avenue (special route) | |
| 500 | Highland Park-Bellevue | 13 Bellevue, 71B Highland Park |
| 501 | Manchester-Wilkinsburg | 16D Manchester, 61A East Pittsburgh-Wilkinsburg |
| A | Moon Flyer | |
| AVN | Allegheny Valley North Flyer | P10 Allegheny Valley Flyer |
| BG | Bellevue-Gass Road Flyer | Discontinued on August 28, 1993. |
| BR | Brentwood Flyer | 51 Carrick, Y45 Baldwin Manor Flyer |
| CL | Clairton Flyer | 46G Elizabeth |
| CO | Coraopolis Flyer | 21 Coraopolis |
| CV | Churchview Flyer | 51D Churchview |
| D/P11 | Middle Rd Flyer |
| DB | Middle Road-Burchfield Flyer | D Middle Road Flyer |
| EB | East Brookline Red Flyer | |
| F | Homestead Park-Lincoln Place Flyer | 53F Homestead-Lincoln Place |
| G | Greensburg Pike Flyer | |
| GC | Garden City Flyer | P67 Monroeville Flyer |
| GR | Greensburg Pike-White Oak Flyer | G Greensburg Pike Flyer |
| H | Homeville Flyer | |
| JL | Jefferson-Large Flyer | |
| ML | Millvale-Lawrenceville Flyer | 3 Millvale |
| OA | Oakland Arrow | Discontinued on February 18, 1977. |
| OV | Ohio Valley Flyer | 14 Ohio Valley |
| P2 | East Busway-Short | Discontinued on October 1, 2023 and replaced with additional P1 East Busway-All Stops trips |
| PH | Pleasant Hills Red Flyer | Discontinued in 1976. |
| SW | Spencer-Willett Flyer | 51B Spencer |
| T | Trafford Flyer | 67F Trafford and 68F Trafford Express |
| U | East Vue Flyer | 78E Penn Hills-East Vue |
| UV | UltraViolet loop | |
| W | Wilkins Avenue Flyer | |

### Former special services

Port Authority operated special park and ride shuttles to Steelers' games and other stadium events from 1967-2011. Routes with an "S" were for servicing one time events.
| Route number | Route name | Service area |
| 13S | Ross Park & Ride | Ross Park & Ride Lot |
| 28S | Moon-West Busway | University Blvd, Bell, Idlewood, Crafton, Columbus's Knights, Sheraden Park & Ride Lots |
| 51S | South Side-Century III | Large and Century III P&R Lots, South Side and Station Square |
| 68S | Monroeville-E Busway | Monroeville and Wilkinsburg P&R, Homewood, E. Liberty, Shadyside, Polish Hill |
| 98D | Strip District | Strip District, Convention Center Parking Garage |
| 98F | Grant Street-First Avenue | 1st Ave and Steel Plaza Stations, Wood and Gateway Center Stations, Downtown P Garage |