Airlines

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Airlines flying from Pittsburgh International Airport

Airlines at Pittsburgh International Airport

Pittsburgh International Airport’s official directory lists the carriers flying year-round and seasonal nonstop routes from western Pennsylvania. The tiles below show the scheduled airlines with their IATA codes and flagship networks — all check-in happens in the Landside Terminal, and your boarding pass carries the gate letter.

Airlines at Pittsburgh International Airport, concourses A to D.

Southwest Airlines

Code IATA: WN Nonstop: 16+ cities — Atlanta, Chicago, Denver, Orlando

American Airlines

Code IATA: AA Nonstop: Charlotte, Dallas/Fort Worth, Philadelphia, Miami

Delta Air Lines

Code IATA: DL Nonstop: Atlanta, Minneapolis/St. Paul, Salt Lake City

United Airlines

Code IATA: UA Nonstop: Chicago O’Hare, Denver, Houston, Los Angeles, San Francisco

Allegiant Air

Code IATA: G4 Nonstop: Florida and sun destinations from its PIT base

JetBlue

Code IATA: B6 Nonstop: Boston, Fort Lauderdale, New York JFK

Breeze Airways

Code IATA: MX Nonstop: Charleston, Hartford, Myrtle Beach, Providence

Alaska Airlines

Code IATA: AS Nonstop: Seattle/Tacoma

Frontier Airlines

Code IATA: F9 Nonstop: Seasonal Denver and Orlando

Sun Country Airlines

Code IATA: SY Nonstop: Seasonal Minneapolis/St. Paul

Air Canada

Code IATA: AC Nonstop: Toronto year-round, Montréal seasonal

British Airways

Code IATA: BA Nonstop: London Heathrow, year-round

Aer Lingus

Code IATA: EI Nonstop: Dublin — new for 2026

Icelandair

Code IATA: FI Nonstop: Seasonal Reykjavík–Keflavík