What Is an Airline Alliance?
An airline alliance is a formal partnership between otherwise independent airlines that lets members share routes, codeshare flights, align loyalty program benefits, and offer reciprocal lounge access, without merging as companies. There are three major global alliances.
The three major alliances
- Star Alliance, founded in 1997, the largest by member count and network reach, anchored by carriers including Lufthansa, United, Air Canada, and Singapore Airlines, among others
- SkyTeam, anchored by carriers including Delta, Air France-KLM, and Korean Air, among others
- Oneworld, anchored by carriers including American Airlines, British Airways, Qatar Airways, and Cathay Pacific, among others
What alliance membership gets you as a traveler
- Earning and redeeming frequent flyer miles across member airlines, not just the one you flew
- Reciprocal elite status benefits, such as lounge access, priority boarding, and extra baggage, often extending to partner airlines within the same alliance based on your status tier
- Easier connections when a single itinerary crosses multiple member airlines, since baggage and check-in processes are generally aligned across the alliance
Alliance vs individual airline partnerships
Not every partnership between two airlines is an alliance membership. Airlines also maintain standalone bilateral codeshare and loyalty agreements outside the three major alliances, which can offer some but not all of the same benefits.
Why it matters when booking
If you're building loyalty with one airline's program, booking within its alliance, even on a different carrier, usually keeps your miles and status progress intact, whereas booking outside the alliance generally doesn't.