Pittsburgh International Airport

Pittsburgh International Airport (IATA: PIT, ICAO: KPIT, FAA LID: PIT)—originally Greater Pittsburgh Airport and later Greater Pittsburgh International Airport—is a civil-military international airport in Findlay Township and Moon Township, Pennsylvania, United States. About 10 miles (15 km) west of downtown Pittsburgh, it is the primary international airport serving the Greater Pittsburgh Region as well as adjacent areas in West Virginia and Ohio. The airport is owned and operated by the Allegheny County Airport Authority and offers passenger flights to destinations throughout North America, Central America, and Europe. PIT has four runways and covers 10,000 acres (40 km²). PIT is the largest civil/public airport in terms of land area in the state of Pennsylvania. It also hosts a sizable United States Air Force base.

First opened in 1952, the airport was initially served by five airlines and became a small hub for Trans World Airlines for over two decades. The airport underwent a massive $1 billion rebuilding and expansion that was largely designed to US Airways' specification so it could become one of their major hubs. Completed in 1992, the new airport was one of the most innovative in the world, dubbed the "airport of the future" by the New York Times, and helped to pioneer modern airport design with its X-shape to reduce distance between gates, underground tram to transport passengers around the airport, and array of shopping options, all of which were cutting-edge at the time. Traffic peaked at 20 million passengers in the late 1990s, and USAir peaked with over 500 daily flights and 12,000 employees at the airport in 2001, and the airport was an important pillar of the Pittsburgh economy.

However, US Airways was unstable in the early 2000s, due in part to the downturn in air travel following the September 11 attacks. USAir declared chapter 11 bankruptcy twice in a row, and reduced operations in Pittsburgh beginning in 2004, eliminating thousands of jobs and nearly bankrupting the airport itself, which was built largely to suit US Airways' needs. However, US Airways' diminished capacity at Pittsburgh opened the door for other airlines to expand operations and better serve local Pittsburgh-area passengers rather than focus on connecting passengers. The airport experienced a resurgence in the 2010s, doubling the number of carriers to 16 as the Allegheny County Airport Authority has aggressively courted airlines and lobbied for new passenger routes. Southwest Airlines has increased its presence at the airport in recent years, overtaking American Airlines (which US Airways merged with) as the largest carrier in terms of passengers. The airport is also a hub for regional carrier Southern Airways Express. Cargo operations have increased at the airport in recent years.

In 2017, the airport became the first in the country to reopen access to the post-security terminal for individuals who are not flying, as long as they can pass through security, after the federal government lifted restrictions put in place after 9/11. In 2021, the airport became the first in the world with its own microgrid, which provides power to the entire airport with natural gas and solar power.

An all-new landside terminal opened in November 2025, along with renovations to the airside terminal. First announced in 2017 and delayed due to the COVID-19 pandemic, construction began in 2021. Officials emphasized that the renovations would make the airport more suited to Pittsburgh, rather than to US Airways. The project costs ballooned from a planned $1.1 billion to $1.7 billion, funded by a mix of revenue sources including airline fees, federal tax dollars, and other airport revenue from parking and concessions.