Question: Republic Airways Holdings, Inc. is an American airline holding corporation based in Indianapolis, Indiana, that owns which regional airline subsidiary of Republic Airways Holdings that operates service as American Eagle, Delta Connection, and United Express using a fleet of Embraer 170 and Embraer 175 regional jets?

Context paragraphs:
Chautauqua Airlines: Chautauqua Airlines, Inc., was an American regional airline and a subsidiary of Republic Airways Holdings based in Indianapolis, Indiana, United States.  Prior to the shut down of operations, it operated scheduled passenger services to 52 airports in the United States and Canada via code sharing agreements as the Delta Connection for Delta Air Lines and AmericanConnection for American Airlines.  Chautauqua previously flew feeder services for other airlines as well via code sharing agreements.  Its last day in operation was December 31, 2014, at which time all flying was absorbed by the Shuttle America certificate.

Republic Airline: Republic Airline Inc., operating as Republic Airline, is a regional airline subsidiary of Republic Airways Holdings that operates service as American Eagle, Delta Connection, and United Express using a fleet of Embraer 170 and Embraer 175 regional jets.  It is headquartered in Indianapolis, Indiana.  Its call sign "Brickyard" is derived from the nickname of the Indianapolis Motor Speedway.

SkyWest Airlines: SkyWest Airlines is a North American airline owned by SkyWest, Inc. and headquartered in St. George, Utah, U.S..  According to the Airlines for America definitions, SkyWest is a North American major airline.  SkyWest however, operates on a regional airline level and is a member of the Regional Airline Association.  SkyWest Airlines flies to 238 cities, in 45 states; Washington, D.C., six Canadian provinces and five cities in Mexico.  The airline serves as a feeder airline, operating under contract with various major carriers.  It flies as SkyWest Airlines in a partnership with Alaska Airlines, as United Express on behalf of United Airlines, as American Eagle on behalf of American Airlines, and as Delta Connection on behalf of Delta Air Lines.  SkyWest also provides ground handling services for airports across the United States.

Republic Airways Holdings: Republic Airways Holdings, Inc. is an American airline holding corporation based in Indianapolis, Indiana, that owns Republic Airline, an American regional airline operating in the United States.

Air Wisconsin: Air Wisconsin Airlines is a regional airline based at Appleton International Airport in the town of Greenville, Wisconsin, United States, near Appleton.  Air Wisconsin is the largest privately held regional airline in the United States.  It currently operates regional jet flights as American Eagle under contract to American Airlines via a code sharing agreement, serving cities in the U.S. and Canada with hubs at Boston Logan International Airport (BOS), Charlotte Douglas International Airport (CLT), Philadelphia International Airport (PHL) and Ronald Reagan Washington National Airport (DCA) .  Air Wisconsin previously operated United Express service on behalf of United Airlines followed by US Airways Express service on behalf of US Airways prior to becoming an American Eagle regional air carrier.  The company has announced it will once again partner with United Airlines as a United Express code sharing air carrier with primary hubs to be located at Chicago O'Hare International Airport (ORD) and Washington Dulles International Airport (IAD) beginning in September 2017 and will be "exclusively operating" as United Express by March 2018.

Midwest Connect: Midwest Connect was the brand name for the regional airline service of Midwest Airlines, rather than a certificated airline carrier.  Skyway Airlines was the sole operator of Midwest Connect since its inception in 1989, until SkyWest Airlines began additional Midwest Connect service on April 1, 2007.  SkyWest took over all Midwest Connect operations following Skyway's shutdown of operations on April 5, 2008.  In October, 2008, Republic Airlines also began operating for Midwest Connect.  On November 3, 2009 the Embraer 170 and Embraer 190 operated by Republic Airlines were rebranded as Midwest Airlines operated by Republic Airlines.  Later, during Midwest's merger with Frontier Airlines under the ownership of Republic, Chautauqua Airlines oprerated as Midwest Connect.

Tigerair: Tiger Airways Singapore Pte Ltd, operating as Tigerair, was a budget airline headquartered in Singapore.  It operated services to regional destinations in Southeast Asia, Bangladesh, China and India from its main base at Singapore Changi Airport.  It was founded as an independent airline in 2003, and was listed on the Singapore Stock Exchange under the Tiger Airways Holdings name in 2010.  In October 2014, parent company Tiger Airways Holdings became a subsidiary of the SIA Group, who took a 56% ownership stake.

MidAtlantic Airways: MidAtlantic Airways was a regional airline based at Pittsburgh International Airport in Findlay Township, Pennsylvania, USA.  It was a subsidiary of US Airways and operated the Embraer 170 medium-jet aircraft as a US Airways Express carrier.  It ceased operations on May 27, 2006.

Compass Airlines (North America): Compass Airlines, LLC, is a regional airline headquartered in Delta Air Lines Building C at Minneapolis−Saint Paul International Airport in Fort Snelling, Hennepin County, Minnesota; prior to December 16, 2009, it was headquartered in unincorporated Fairfax County, Virginia, United States, east of the Chantilly CDP.  The airline launched inaugural service with a single Bombardier CRJ200LR aircraft under the Northwest Airlink (now Delta Connection) brand between Minneapolis/St.  Paul and Washington, D.C. on May 2, 2007.  On August 21, 2007, it began flying two Embraer 175 76-passenger aircraft, and expanded to 36 aircraft by December 2008.

Mesa Air Group: Mesa Air Group, Inc. is a Nevada Corporation commercial aviation holding company with headquarters in Suite 700 at 410 North 44th Street in the Camelback East area of Phoenix, Arizona, United States.  The company operates one regional airline subsidiary: Mesa Airlines which operates as American Eagle, US Airways Express and United Express under contractual agreements with American Airlines and United Airlines respectively.

Supporting paragraphs: Republic Airways Holdings Republic Airline
Answer: Republic Airline