A lost baggage claim is not one form you fill out once. It is a sequence. A report filed at the airport, deadlines that shift by airline and by border, and a written claim that only works once those first two steps are done in order.
Skip the first step and everything after gets harder. The file reference that report produces is the one thing every later call and reimbursement depends on.
File the Property Irregularity Report before you leave the airport
Airlines call the initial report a Property Irregularity Report, or PIR. File it at the baggage service desk in the arrivals hall. Do this before you walk out through the exit doors.
The desk may carry a ground handler’s name instead of your airline’s. That is normal. What matters is that the report lists your actual flight number.
The PIR produces a file reference, sometimes called a file ID. Write it down or photograph the printed slip. You will quote it on every call after this one.
What you need to hand over at the desk
Bring your boarding pass and your bag tag stub. The stub is the small barcoded receipt stapled to your ticket jacket at check-in. It lets an agent match your description to a barcode still moving somewhere in the system.
- Your bag tag stub and boarding pass or e-ticket confirmation.
- A clear description of the bag: brand, color, size, and any distinctive tag.
- The address where the bag should be delivered once it is found.
Mention it if you photographed the bag before you checked it. A photo settles disputes about color or model faster than a description alone.
The deadlines that actually bind
This is where most travelers lose ground without realizing it. Reporting a missing bag is a different deadline from filing a written claim for its contents. Both differ again between a domestic trip and one that crosses a border under the Montreal Convention.
Damage claims carry the shortest window of the three. Domestically that is often the same day or within 24 hours. International trips get more room, because the Montreal Convention sets a floor no airline can shorten.
| Claim type | Typical domestic window | International, Montreal Convention floor |
|---|---|---|
| Missing or delayed bag report | Before you leave the airport | Before you leave the airport |
| Damage claim | Same day up to about 24 hours, varies by airline | Within 7 days of receiving the bag |
| Missing contents claim | Typically 24 hours from delivery | Within 7 days of delivery |
| Delay compensation claim | Set by each airline’s own contract of carriage | Within 21 days of the bag being returned |
Those domestic figures are examples, not a universal rule. Every US carrier writes its own claim deadlines into its own checked baggage terms. A lost baggage claim that feels rushed on one airline can run longer on another.
From the desk to the airline’s central baggage claims team
The airport desk handles the first report and short term tracing. A formal claim, a dispute, or a reimbursement request moves further, to the airline’s central baggage claims team. Most carriers run that team through an online portal or a dedicated phone line.
Log in or call using the file reference from your PIR. Do not lead with just your name and flight. Agents working a case backlog cannot search by memory.
There is a second shift buried in this step. Most airlines treat a bag as delayed, and reimburse only reasonable expenses, for somewhere between five and fourteen days after the flight. Past that window the same airline typically calls the bag lost.
The claim then changes shape, from expense reimbursement to a full loss claim valued against a liability limit. Our guide to lost, delayed, and damaged baggage covers what that limit pays. The dollar figures are a separate topic from the filing steps here.
Building the written claim: receipts and proof of contents
A phone report opens the case. A written claim is what actually gets paid, and it needs paperwork the airport desk never asked for.
- An itemized list of what was in the bag, with an estimated value for each item.
- Original, dated receipts where you still have them, or credit card statements as backup.
- Receipts for anything bought while the bag was missing, for interim reimbursement.
Claims with thin documentation get thin settlements, if they get one at all. Keep medication, chargers, and a change of clothes in your carry-on to begin with. Our carry-on rules guide lays out what fits in the cabin.
When the airline goes quiet: the DOT complaint route
Airlines must acknowledge a written complaint within 30 days. A substantive response is due within 60 days. If that window passes with silence, the next move is a formal complaint to the Department of Transportation.
A DOT complaint is not another phone call. It creates a public record against the airline. That tends to produce a real answer where routine follow up did not.
Keep the file reference and every prior email or portal message before you file. DOT will ask what you already tried. A lost baggage claim with a clean paper trail moves faster through that process.
Community reports back this up. Travelers who quoted their PIR and attached a dated claims timeline in a DOT complaint describe faster movement than those who simply restated the story from scratch. If your ticket or hotel points to real spending pressure, our baggage cost tool can help you judge what a delay is actually worth chasing versus letting go.
Common questions
What is a PIR or file reference number?
It is the case number an airline opens the moment you report a missing, delayed, or damaged bag. Every later call and reimbursement traces back to it.
How long do I have to file a lost baggage claim?
Report the bag before you leave the airport. The written claim deadline after that depends on the trip and the airline, so check the confirmation the desk gives you.
What happens when a delayed bag becomes a lost bag?
Most airlines make that call between five and fourteen days after the flight. The claim then shifts from covering your expenses to a full loss claim against a liability limit.
What if I already left the airport without reporting the bag?
You can still file by phone or online with most carriers. It weakens your position slightly, since the airline can argue you had the bag longer than you did.
Do I need original receipts to file the claim?
They help, but most airlines also accept an itemized list, credit card statements, or photos of the packed bag. Undocumented claims are the ones most often reduced.
What if the airline denies my claim or stops responding?
Ask for the denial in writing and the reason cited. If the airline misses its response window, file a complaint with the Department of Transportation rather than repeating the same call.