You book a flight with Airline A, but when you get to the gate, the plane says Airline B. Welcome to codesharing — one of the most common and least understood practices in commercial aviation.
What Is a Codeshare Flight?
A codeshare is an arrangement where one airline sells tickets on a flight operated by a different airline. Both airlines assign their own flight number to the same physical aircraft. You might book "AA 5234" (American Airlines), but the actual plane, crew, and service are provided by "BA 123" (British Airways).
Why Airlines Use Codeshares
- Expanded network: Airlines can sell tickets to destinations they don't physically fly to
- Alliance partnerships: Members of airline alliances (Star Alliance, Oneworld, SkyTeam) extensively codeshare to create seamless global networks
- Revenue sharing: Both airlines earn from the same seat
- Customer convenience: Passengers can book connecting flights on a single ticket, even if different airlines operate the legs
What It Means for You as a Passenger
- Service quality: You'll receive the operating airline's service, not the marketing airline's. If you book through Airline A but Airline B operates, expect Airline B's seats, food, entertainment, and crew
- Frequent flyer miles: You can usually credit miles to either the marketing or operating airline. Check before flying — crediting to the right program matters
- Baggage rules: Generally, the marketing airline's baggage policy applies for the first flight, but this can get complicated on multi-segment trips. Always verify
- Check-in: You can typically check in with either airline, but the operating airline's check-in counter is usually more efficient
Frequently Asked Questions
How do I know if my flight is a codeshare?
Look for the phrase "Operated by [Airline Name]" in your booking confirmation. On Google Flights, codeshare flights show the operating airline in smaller text below the marketing airline's flight number.
Is a codeshare flight worse than a direct booking?
Not necessarily. You get the exact same plane and service regardless of which airline's ticket you hold. However, if things go wrong (delays, cancellations), resolving issues can be more complicated because two airlines are involved.
Can I earn miles on a codeshare flight?
Yes, but earning rates may differ. You'll typically earn miles at a lower rate if crediting to the marketing airline rather than the operating airline. Check both programs' earning charts before deciding where to credit.
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