American Airlines is a founding member of the oneworld alliance, which in 2026 includes major international partners such as British Airways, Iberia, Qatar Airways, Japan Airlines (JAL), Cathay Pacific, Qantas, Finnair, and Alaska Airlines. Beyond the formal alliance, American maintains extensive bilateral partnerships with carriers like Etihad Airways, GOL Airlines, Hawaiian Airlines, and JetSMART. They also have a significant "Atlantic Joint Business" agreement with British Airways, Aer Lingus, and Iberia, allowing for seamless booking and mileage earning across the Atlantic. For travelers in 2026, these partnerships mean you can earn and redeem AAdvantage miles on flights operated by nearly 30 different airlines worldwide. This global network is further enhanced by "intermodal" partnerships with rail providers like Deutsche Bahn in Germany, allowing passengers to book a single itinerary that includes both a flight and a high-speed train connection to cities without major airports.