Do baggage policies of an airline apply if the operator is another airline?

If your flight has a section with a partner airline, IATA regulations for baggage allowance applies. This regulationindicates the following: If baggage allowances for both operators are the same, this rule applies. If baggage allowances are different, the most important airlinepolicy applies (Most Significant Carrier).



In 2026, baggage rules for codeshare or multi-airline itineraries generally follow the "Most Significant Carrier" (MSC) rule, established by IATA Resolution 302. This means that if you book with Airline A but the longest or most geographically significant part of your journey is operated by Airline B, Airline B's baggage allowances and fees typically apply. However, for flights traveling to or from the United States or Canada, the "First Marketing Carrier" rule often takes precedence, where the rules of the airline whose code is on the first segment apply for the entire journey. It is crucial to check your specific ticket receipt, as it will explicitly state your baggage allowance. Because different airlines have varying weight limits (e.g., 23 kg vs 32 kg) and size restrictions, travelers should always confirm which carrier's policy is active to avoid unexpected "excess baggage" fees at the check-in counter.

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With a codeshare flight, the operating carrier is the airline that flies the plane, and the marketing carrier is the partner airline that sells seats on the operating carrier's flights. You can tell which carrier is operating your flight: Next to the flight number when you book the flight.

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Here's what you're expected to encounter: If you checked a bag, you'll have to collect it from baggage claim from the international flight. You'll need to clear customs and immigration. Next, you'll recheck your luggage for the domestic flight.

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If you checked a bag, you'll have to collect it from baggage claim from the international flight. You'll need to clear customs and immigration. Next, you'll recheck your luggage for the domestic flight. Finally, you'll need to go through Transportation Security Administration screening.

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Most (but again, not all) airports connect international terminals airside. When you're connecting from an international flight to a domestic one, you'll always have to exit and reenter security as you'll need to go through customs and immigration (unless you have gone through preclearance aboard, which is rare).

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In most cases, you'll receive your boarding pass for your connecting flight already when you check in for your first flight. This means you don't have to check in again for your next flight. If you haven't received it, you can go to the transfer desk or kiosk of the airline you're flying with to collect it.

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In most cases, if you are booked on a single itinerary with Air France for example, and your first flight is with Air France, and the second is a codeshare on KLM, you will not have to recheck bags during the layover to KLM. Your bags would be ticketed and checked all the way through to your final destination.

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Yes. While airlines are not required to put you on another airline's flight, they can and sometimes do, so it does not hurt to politely ask your airline if it will transfer your ticket to another airline that has a flight with available seats.

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While skiplagging isn't illegal, American Airlines filed a civil lawsuit earlier this month against Skiplagged.com, accusing the company of unauthorized and deceptive ticketing practices and tricking customers into believing they've gained access to a secret loophole.

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Yes, your luggage can be checked into the last destination when you fly in a connecting flight with different airlines. When you book a ticket with multiple flights on one booking code, the airline will usually check your bags through to the final destination.

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Do you have to pay baggage fees for connecting flights? No-your bag fee is to your destination. But beware-if you're traveling internationally, you have to pay each airline's fee.

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However, the only time you have to get your checked bag and re-check it is when you have to go through customs and you have a connecting flight. You go through customs in the first country you land in.

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If you have booked a connecting flight, in most cases your baggage can be checked through to your final destination. That means your baggage will automatically be transported to your destination airport without you having to do anything when connecting to another flight.

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Factors to consider before leaving the airport during a layover. If you have an excessive layover time you may be wondering: Can I leave the airport between connecting flights? The short answer is yes. It is possible to exit and reenter the airport.

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