Star Alliance: The First Global Airline Network

Before Star Alliance launched in May 1997, no airline had tried to build a truly global network of shared flights and shared loyalty schemes across several continents and several independently owned airlines. Five airlines took the risk together: Air Canada, Lufthansa, Scandinavian Airlines, Thai Airways and United Airlines. The five-pointed star in the logo still stands for those founders, even though the alliance now has 26 member airlines, more than any rival.

What does joining actually get a passenger?

An alliance isn’t a merger. Member airlines stay fully independent. They keep their own fleets, set their own prices and compete with each other on plenty of shared routes. What membership buys is concrete. There are codeshares, so a Lufthansa-operated flight can be sold under a United flight number, and the other way round. Frequent-flyer schemes work across airlines, so miles earned on one member can be spent on another. Lounges are shared worldwide. And bags are transferred and passengers rebooked between two different member airlines on one ticket, which unrelated airlines wouldn’t normally offer each other.

Why a joint venture needs a government’s permission and an alliance doesn’t

The basic alliance benefits above don’t need a regulator’s approval: any airline can sign a codeshare or a frequent-flyer deal. The deeper joint ventures inside Star Alliance (covered below) are a different legal matter. Two competing airlines agreeing to share revenue and coordinate prices on the same routes is exactly what competition (antitrust) law normally exists to stop. So it’s only legal with antitrust immunity granted by governments. The US Department of Transportation has long required an “Open Skies” agreement between the two countries involved before it will even consider that immunity. That’s why the deepest transatlantic joint ventures sit on the country pairs that actually have Open Skies agreements, not wherever two allied airlines happen to want one.

Scale in numbers

26 member airlines operating a combined fleet of more than 5,000 aircraft, serving over 1,300 airports across 195 countries, with roughly 19,000 daily departures between member carriers.

Codeshare vs joint venture — the distinction that actually matters

Alliance membership and a joint venture are different commitments, and mixing them up misreads how Star Alliance’s biggest members operate. A codeshare, the basic alliance benefit, simply lets one airline sell seats on a partner’s flight under its own flight number. It’s a light commercial agreement. A joint venture goes much further. United, Lufthansa and Air Canada run a transatlantic joint venture that’s “metal-neutral”: they share the revenue from each journey on joint routes, whichever airline’s aircraft the passenger actually flies. That joint venture, not Star Alliance membership itself, drives the coordinated schedules, joint pricing and shared profit on the North Atlantic. Star Alliance membership is the wide net that lets 26 airlines’ loyalty schemes and lounges work together. The joint venture between three of those 26 is where the deeper, revenue-sharing commitment lives.

Membership isn’t permanent — and it cuts both ways

In 2024, as Scandinavian Airlines (SAS) came out of bankruptcy protection, Air France-KLM Group took a 19.9% stake in it. On 1 September that year SAS, a Star Alliance founder for nearly three decades, left Star and joined SkyTeam, following its new shareholder’s alliance. (Air France-KLM agreed in 2025 to raise its stake to 60.5%, a deal expected to complete in the second half of 2026.) It isn’t an isolated case, and the same thing has happened in the other direction too. Continental Airlines flew its last SkyTeam service on 24 October 2009 and joined Star Alliance three days later. At the time it was read as an early sign of its merger with United Airlines, which followed. United was already a Star founder, and Continental couldn’t stay split across two rival networks once the two combined. Five years later the same logic pulled another airline the other way. US Airways, a Star member since 2004, left on 30 March 2014 and joined Oneworld the next day, in line with its merger into American Airlines, then under way. So Star Alliance gained a member that was about to merge into it (Continental) and lost one that was about to merge out of it (US Airways), by the same route, five years apart. Asiana Airlines is due to do it again in December 2026, leaving Star for SkyTeam as it merges into Korean Air, which took control of it in December 2024. Which alliance an airline belongs to is really a question of who owns it, not what it prefers.

Sources & Further Reading

• Star Alliance — Wikipedia ↗
• The Story Of Star Alliance — Simple Flying ↗
• Airline Alliances Vs Joint Ventures: What's The Difference? — Simple Flying ↗
• International Air Alliances: DOT Antitrust Immunity Oversight — U.S. GAO ↗
• The Story Of US Airways — Simple Flying ↗