British Airways is a founding member of the oneworld alliance, meaning it is closely linked to 14 other major global carriers. Its primary partners include American Airlines, Finnair, and Iberia, with whom it shares a "joint business" for transatlantic travel. Other oneworld partners include Qatar Airways, Qantas, Japan Airlines, Cathay Pacific, Alaska Airlines, and Fiji Airways. In 2025 and 2026, the alliance welcomed Oman Air as a full member, further expanding the network in the Middle East. Beyond the alliance, BA has strategic partnerships with China Southern and its own sister airlines under the International Airlines Group (IAG) umbrella, such as Aer Lingus and Vueling. For travelers, these links mean you can earn and spend Avios across all these airlines, enjoy reciprocal lounge access for elite members, and book "seamless" multi-city itineraries through a single reservation system.