At Philadelphia International Airport (PHL) in 2026, American Airlines is the dominant carrier and operates across several terminals depending on the destination. Terminals B and C serve as the primary hubs for most domestic departures and arrivals, featuring the largest concentration of American check-in desks and the B/C Connector Admirals Club. Terminal A-West and A-East are used for international flights and some select domestic routes, with the A-West terminal housing the flagship lounges for premium transatlantic travel. Finally, Terminal F is the dedicated home for American Eagle regional flights, connected to the other terminals by a shuttle bus system. In 2026, travelers should always check the American app before arrival, as the airline frequently shifts gates to manage PHL's 30-million-plus annual passenger load, but generally, if you are flying a large jet domestically, you'll start your journey in the B/C complex.