Modern airline alliances and codeshare agreements mean that the airline whose name is on your ticket may not be the one whose crew flew the aircraft. Under EC261, this distinction is not just academic — it determines who you can claim from, and getting it wrong can delay your claim by weeks or months as you are redirected between airlines.
The difference explained
The marketing carrier is the airline that sold you the ticket. Their code appears in your booking reference, their logo is on your e-ticket, and their loyalty programme is where you earned or redeemed points. The operating carrier is the airline that actually flew the aircraft. Their crew was on board, their plane was used, and their operational decisions determined whether the flight departed on time.
On a non-codeshare flight, these are the same airline. On a codeshare, they can be different. You might book through KLM's website, see a KL flight number in your confirmation, and arrive at the airport to find an Air France aircraft with Air France crew operating the route.
Why this matters for claims
EC261 places obligations on the operating carrier. It is the airline that physically operated (or was supposed to operate) the flight that is responsible for compensation. The marketing carrier has no EC261 obligations for a flight it did not operate, even if it sold you the ticket.
Always claim from the operator
Check your booking confirmation for the phrase "operated by," which identifies the airline you should direct your claim to. If you are unsure, your boarding pass will show the operating airline's flight number and code.
Common scenarios
Alliance codeshares. Within SkyTeam, Star Alliance, and oneworld, codeshares are standard. A flight sold as British Airways BA1234 might be operated by Iberia IB5678. Your claim goes to Iberia.
Franchise operations. Regional carriers often operate under a major airline's brand. A flight marketed as "Lufthansa" might be operated by Lufthansa CityLine or Air Dolomiti. The franchise operator is the operating carrier for claims purposes.
Wet leases. Airlines sometimes lease aircraft complete with crew from other carriers. The lessor airline is typically the operator in this arrangement.
What if you claim from the wrong airline?
If you mistakenly submit your claim to the marketing carrier instead of the operator, the marketing carrier should redirect you. Some do this promptly; others use it as an opportunity to let the matter go quiet. If you are redirected, submit a fresh claim to the correct airline immediately. The limitation period continues to run, so do not let the misdirected claim eat into your available time.