Where the bag physically goes, the money you are owed, and the one thing to do before you leave the airport. U.S. rules, verified against the DOT's own publications. Rules last reviewed: August 2026.
Your bag follows your ticket. Rebooked on the same airline: the bag is re-routed to your new flights automatically, and usually makes it. Rebooked on a different airline or taking a refund: the bag has to be physically pulled and handed over or returned to you, and that is where bags get lost. Either way, if you paid a bag fee and things go wrong, U.S. rules put real money back in your pocket - the fee itself, and up to $4,700 in liability if the bag never comes back. File a mishandled baggage report before you leave the airport; every right below starts with that report.
Same-airline rebooking (most cancellations): checked bags are tagged to your final destination, not to a flight number. When the airline rebooks you, the baggage system re-routes the tag to your new flights. You do not need to re-check the bag, and in most cases you should not try to retrieve it. Bags do miss transfers during disruptions, so ask the agent to confirm the bag is moving with you - they can see its last scan.
Different-airline rebooking: your original airline has to pull the bag and hand it to the new carrier. This is the highest-risk path for separation. Before you leave the counter, ask the agent to confirm the interline bag transfer and note the agent's name and time. If the bag does not make your new flight, it follows on a later one and the airline delivers it - a courtesy nearly all large U.S. airlines extend, though delivery windows vary.
You take the refund and stop traveling: the bag is pulled from the system and returned to you at the airport's baggage service office. This can take anywhere from under an hour to several hours during a disruption - ask for a realistic estimate, and do not leave the airport without either the bag or a written record of where it is.
Stuck overnight: the bag usually stays in the airline's system overnight rather than being returned for the night. Airlines are not required to return it on demand mid-journey. This is why medication, chargers, documents, and one change of clothes belong in your carry-on, always.
If your flight is canceled and you choose a refund instead of rebooking, the DOT's 2024 automatic-refund rule requires the airline to refund the fare and the checked bag fee to your original payment method - cash or card, not a voucher, unless you knowingly accept one.
If you travel but your bag does not, you are entitled to the bag fee back once two things are true: you filed a mishandled baggage report, and the bag was not delivered within 12 hours of your domestic flight arriving at the gate, or within 15 to 30 hours for an international flight depending on its length. No report, no clock - file it before you leave the airport.
U.S. domestic trips: federal rules cap airline liability at $4,700 per passenger as of August 2026. Most international trips fall under the Montreal Convention, where the cap is about 1,519 Special Drawing Rights, roughly $2,000. These are ceilings, not automatic payouts - airlines pay the substantiated, depreciated value of what was inside, so a list of contents and any receipts you can find matter more than the cap.
Most large U.S. airlines commit, on the DOT's customer-service dashboard, to reimbursing reasonable interim expenses - toiletries, essential clothing - while your bag is delayed. Keep every receipt, keep purchases modest, and submit them with your file reference number. Airline policies on caps and daily limits vary.
1. Keep your bag tag stubs. The small barcode stickers from check-in are the bag's identity. Photograph them now.
2. Before leaving the airport, file a mishandled baggage report at the airline's baggage service office (or in the airline's app, if offered). Get the file reference number and photograph the report. This single step starts the fee-refund clock, creates the record for the liability claim, and is what interim-expense reimbursement is checked against.
3. If you were rebooked onto another airline, confirm at the counter which airline is responsible for the bag now. The airline that took your money generally owns the problem, but knowing who has the bag saves days.
4. Track deadlines. For international trips under the Montreal Convention, written complaints are due within 7 days for damage and 21 days for delay, counted from delivery. Domestic deadlines are set by each airline's contract of carriage and are often 24 hours for damage - report immediately rather than researching the exact window.
5. If the bag is declared lost, submit an inventory with values and any receipts. Expect the airline to depreciate. If the total exceeds what they offer and you are under the cap, push back in writing with your documentation.
Gate-checked bags (tagged at the jet bridge) are checked baggage in the rules' eyes - the same report, refund, and liability rights apply.
"Short-checked" bags - checked only to your connection city on a long layover - come back at the connection's carousel; after a cancellation there, treat it like a refund-and-stop case: go to the bag office before rebooking conversations end.
Valuables: airlines exclude or limit liability for cash, electronics, and jewelry in checked bags in their contracts of carriage. The cap will not save a laptop. Carry it on.
U.S. DOT, What Airline Passengers Need to Know About DOT's Automatic Refund Rule (bag-fee refund, 12-hour and 15-30-hour thresholds, original-payment requirement) · Refunds and Other Consumer Protections, 89 FR (Apr 26, 2024) · U.S. DOT domestic baggage liability limit, 14 CFR Part 254 (inflation-adjusted; $4,700 as of this page's review) · Montreal Convention Art. 22 as revised effective Dec 28, 2024 (1,519 SDR) · U.S. DOT Airline Customer Service Dashboard (interim-expense commitments).
General guidance, not legal advice. Airline contracts of carriage differ; figures reviewed August 2026. Found an error? Tell us and we will fix it.
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