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.
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