Baggage allowance airline rules define how many bags a passenger can check or carry, plus the weight and size caps that apply to each fare, route, and loyalty tier.
Allowances split by piece concept (typical for the Americas) or weight concept (typical for Europe, Asia, and the Middle East), and the two are not interchangeable on interline itineraries. Support tickets cluster around three moments: pre-flight questions on the correct allowance, overage disputes at the airport, and mishandled bag claims after arrival. Each ticket needs the fare rules, the codeshare, and the operating carrier on hand.
For interline bookings, the Most Significant Carrier (MSC) rule generally sets the allowance across the whole trip. Verify the current MSC logic against the primary IATA source at build time.
Common questions
Whose baggage allowance airline rule applies on a codeshare?
Usually the marketing carrier’s rule at the point of check-in, but the operating carrier can enforce its own limits. Confirm both before quoting a passenger.
What happens when a bag is delayed on arrival?
The passenger files a Property Irregularity Report (PIR) with the operating carrier. The support agent tracks the file reference and closes the ticket once the bag is delivered.