Question: Which airport is further west, Dayton International Airport or Friday Harbor Airport?
Context: Dayton International Airport (IATA: DAY, ICAO: KDAY, FAA LID: DAY) (officially James M. Cox Dayton International Airport), formerly Dayton Municipal Airport and James M. Cox-Dayton Municipal Airport, is ten miles north of downtown Dayton, in Montgomery County, Ohio.  The airport is within the city limits of Dayton, in an exclave of Dayton not contiguous with the rest of the city.  Its address is 3600 Terminal Drive, Dayton, Ohio 45377. PSA Airlines, Inc. is an American regional airline headquartered at Dayton International Airport in Vandalia, Ohio, that flies under the American Eagle brand for American Airlines.  PSA is a wholly owned subsidiary of American Airlines Group.  PSA has crew bases in Washington, D.C.; Knoxville, Tennessee; Charlotte, North Carolina; Cincinnati, Ohio; and Dayton, Ohio.  It has maintenance bases in Charlotte, North Carolina; Cincinnati, Ohio; Dayton, Ohio and at the Akron–Canton Airport in Green, Ohio. The Vectren Dayton Air Show is an annual event held at the Dayton International Airport in Vandalia, Ohio, eight miles north of Dayton, Ohio.  This Air Show takes place on a weekend in mid-July each year, but as of 2013, late June.  The history of this flight exhibition dates back to 1910 and the Wright Company.  Dayton is the hometown of the Wright Brothers and is where Orville and Wilbur built their first powered plane.  The show's main sponsor is Vectren and it is considered to be one of the country’s premier aviation events. America West Airlines was a U.S. airline headquartered in Tempe, Arizona.  Their main hub was at Sky Harbor Airport in Phoenix, Arizona, with a secondary hub at Las Vegas McCarran International Airport in Las Vegas, Nevada.  The airline became part of the US Airways Group after it acquired the larger airline in 2005 and adopted the US Airways brand name.  America West was the second largest low-cost carrier in the U.S. after Southwest Airlines and served approximately 100 destinations in the US, Canada, and Mexico.  Service to Europe was provided through codeshare partners.  In March 2005, the airline operated a fleet of 132 aircraft, with a single maintenance base at Sky Harbor Airport in Phoenix.  Regional jet and/or turboprop feeder flights were operated on a code sharing basis by Mesa Airlines and Chautauqua Airlines as America West Express. Bishop International Airport (IATA: FNT, ICAO: KFNT, FAA LID: FNT) is a commercial and general aviation airport located in Flint, Michigan.  It is named after banker and General Motors board member Arthur Giles Bishop (April 12, 1851 – January 22, 1944), who donated 220 acres of his farmland for the airport in 1928.  The third busiest airport in Michigan, it surpassed competitor MBS International Airport in terms of airline operations in 2002.  In 2007, 1,071,238 passengers used Bishop International Airport; in 2011, 938,914 passengers used the airport.  It is included in the Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2017–2021, in which it is categorized as a small hub primary commercial service facility.  The airport is currently served by several passenger airlines: Allegiant Air, Southwest Airlines and Delta Air Lines operate mainline service out of the airport, as well as affiliates of Delta Connection, United Express and American Eagle.  Additionally, FedEx Express and a FedEx Feeder affiliate operate cargo services out of the airport.  Accompanying the airlines is fixed-base operator Av Flight that handles both general aviation and airline operations and the flight school American Wings Aviation.  Bishop International Airport is in southwestern Flint, and is surrounded by Flint Township to the north, east and west; and Mundy Township to the south. Henderson Executive Airport (IATA: HSH, ICAO: KHND, FAA LID: HND) is a public airport located 11 NM south of the central business district of Las Vegas, in Clark County, Nevada, United States.  The airport is owned by Clark County and operated by the Clark County Department of Aviation.  According to the FAA's National Plan of Integrated Airport Systems for 2009-2013, it is categorized as a "reliever airport".  It was originally known as Sky Harbor Airport, but was renamed in 1996 when it was purchased by Clark County to be used as a reliever airport for McCarran International Airport. Friday Harbor Airport (IATA: FRD, ICAO: KFHR, FAA LID: FHR) is a public use airport located just southwest of the town center of Friday Harbor on San Juan Island in the U.S. state of Washington.  It is owned by the Port of Friday Harbor.Friday Harbor is also the default airport of "Microsoft Flight Simulator X", although Aircraft spawn in the air above the airport and must land there first. The Niagara Frontier Transportation Authority (NFTA) is a public authority responsible for the public transportation oversight of Erie and Niagara counties in the state of New York.  The NFTA, as an authority, oversees a number of subsidiaries, including the NFTA Metro bus and rail system, the Buffalo-Niagara International Airport, the Niagara Falls International Airport and NFTA Small Boat Harbor.  The NFTA Metro bus and rail system is a multi-modal agency, utilizing various vehicle modes (diesel bus, diesel-hybrid bus, CNG bus, light rail and cut-away van), using the brand names: NFTA Metro Bus, NFTA Metro Rail, NFTA Metrolink and NFTA PAL (Para-transit Access Line).  In addition, the NFTA also owns and manages a number of properties, including the Buffalo Metropolitan Transportation Center in Downtown Buffalo (which serves as the agency's headquarters); the Niagara Falls Transportation Center on Factory Outlet Blvd. the Portage Road Transit Center in Niagara Falls; and a number of strategically located bus loops and transit centers in the Buffalo Niagara region.  Of note, many of the bus loops have been in continuous operation since the days of the International Railway Company, a predecessor to the NFTA.  Agency-wide, the NFTA employs 1,500 full-time and part-time employees.  There are three business centers that operate as the NFTA organization: Surface Transportation, which handles ground transportation throughout Erie and Niagara counties, Aviation, which handles air related business at the Buffalo-Niagara International Airport and Niagara Falls International Airport and Property Risk/Management, which operates the NFTA-Boat Harbor and handles other properties that are owned and/or operated by the NFTA. Dayton–Wright Brothers Airport (IATA: MGY, ICAO: KMGY, FAA LID: MGY) is a public airport located 10 miles (16 km) south of the central business district of Dayton, Ohio, located mainly in Miami Township, Montgomery County and partly in Clearcreek Township, Warren County, near the suburb of Springboro.  It is owned and operated by the City of Dayton and serves as the reliever airport for Dayton International Airport.  It mainly serves corporate and personal aircraft users.  The airport's identifying code, MGY, is a reference to its former name of Montgomery County Airport. Vandalia is a city in Montgomery County, Ohio, United States, and a suburb of Dayton.  Its population was 15,246 during the 2010 census.  In addition to being the city closest to Dayton International Airport, Vandalia lies at the crossroads of I-75 and I-70, making it a major hub for business.
Answer: Friday Harbor Airport