Airline Contract of Carriage: What It Is and Why It Matters

The contract of carriage is the legal agreement between you and your airline the moment you buy a ticket. It spells out exactly what the airline owes you when things go wrong—cancellations, delays, lost bags, bumping—and what it doesn't. When a gate agent tells you "that's just our policy," the contract of carriage is the document that either backs them up or proves them wrong. You can read it free on any US airline's website, and knowing which section to point to is often the difference between getting a hotel voucher and sleeping in the terminal.

What the Contract of Carriage Actually Is

Every US airline is required to publish a contract of carriage (sometimes called "conditions of carriage"). It's a long, dense document—United's runs over 50 pages—but it's the binding terms of your ticket. When you click "purchase," you agree to it, whether you read it or not.

It covers, in legally enforceable detail:

• What happens when your flight is cancelled or delayed (Rule 240 territory on legacy carriers)
• Refund eligibility and timing
• Checked and carry-on baggage rules and liability limits
• Denied boarding (bumping) compensation
• Rebooking and rerouting obligations
• Rules for pets, minors, and passengers needing assistance

Here's the key thing: the contract of carriage is the airline's own commitment, and it's enforceable. Federal law (the Airline Deregulation Act) preempts most state-level claims, so if you want to hold an airline to a promise, that promise almost always has to live inside the contract of carriage.

Federal Rules That Override the Contract

The airline writes most of its own terms, but a few things are set by the US Department of Transportation and cannot be undercut by the contract. If a contract clause conflicts with these, the federal rule wins.

Refunds for cancellations and significant changes

Under the 2024 DOT refund rule (effective for tickets going forward), if your airline cancels or significantly changes your flight and you choose not to accept the alternative, you are owed an automatic cash refund to your original form of payment. "Automatic" means you shouldn't have to beg for it. A "significant change" includes:

• A departure or arrival time that moves by more than 3 hours domestically or more than 6 hours internationally
• A change to your departure or arrival airport
• An added connection or a downgrade in class of service

Refunds must be issued within 7 business days for credit card purchases and 20 calendar days for cash or check. The airline cannot force you to take a travel voucher instead of cash. This rule applies even if the airline's own contract of carriage says something stingier.

Denied boarding (bumping) compensation

This is the one area where US law does mandate cash compensation. If you're involuntarily bumped from an oversold domestic flight, DOT sets the minimums:

For international flights, the 1–2 hour band extends to 1–4 hours. This must be paid by cash or check, not a voucher, if you ask. We break down every step in Bumped from a Flight? Denied Boarding Compensation Explained.

Baggage liability

DOT caps airline liability for lost, damaged, or delayed checked bags on domestic flights at $3,800 per passenger. On international itineraries, the Montreal Convention sets a lower limit—roughly $1,700 (1,288 SDRs). The contract of carriage will state the airline's specific claim procedures and deadlines, which you must follow to collect.

What the Contract Does NOT Give You

This trips up a lot of travelers who've flown in Europe. The US has no mandatory delay-compensation law. There is no US equivalent of EU261, which pays passengers €250–€600 for delays regardless of refund.

If your US flight is delayed three hours because of weather or a mechanical issue and you still fly, the airline owes you nothing in cash under federal law. What you may get—meal vouchers, a hotel for an overnight controllable delay, rebooking—comes entirely from the airline's contract of carriage and its published customer-service commitments. And those vary a lot:

• Delta, United, and American now commit (per their DOT dashboard promises) to rebook you at no cost and provide meals for controllable delays over 3 hours, plus a hotel and ground transport for controllable overnight delays.
• "Controllable" is the magic word. A mechanical problem or crew shortage is controllable. A thunderstorm or air traffic control ground stop is not—and for weather delays, most contracts explicitly say you get nothing beyond rebooking.

Read the delay/cancellation section of your carrier's contract before you argue at the gate. If the delay is "controllable" and the airline is refusing amenities they've publicly promised, that's your leverage.

How to Find and Read the Section You Need

You don't need to read all 50 pages. Go to the airline's website, search "contract of carriage," and use these landmarks:

1. Refunds — Search for "Refund" or the rule number. Confirms your cash-refund rights and the payment timeline.
2. Cancellations and delays — Often titled "Schedule Irregularities" or "Rule 240." This states rebooking and amenity obligations.
3. Denied boarding — "Oversales" or "Denied Boarding Compensation." Confirms the federal minimums above.
4. Baggage — Liability limits, claim deadlines (often 24 hours for damage, 45 days for lost), and excluded items.

Screenshot the exact clause. When you're on the phone or at the desk, quoting the airline's own document by section name is far more effective than saying "I read online that…"

Using the Contract to Actually Win Your Case

The contract of carriage is your evidence. Here's how to put it to work:

• Save everything. Boarding pass, delay notifications, the reason the airline gave (get them to say "mechanical" or "crew," not just "delay").
• Quote the section. "Your contract of carriage, Rule 240, says you'll cover a hotel for a controllable overnight delay. This is a crew issue. I'd like the hotel voucher."
• Escalate in writing. If the desk won't help, request the amenity or refund in writing through the airline's customer-relations form, citing the clause and the DOT refund rule.
• File a DOT complaint if they stonewall. Airlines are required to respond to DOT complaints, and the agency tracks patterns. Our step-by-step guide to filing a DOT complaint against an airline walks through exactly what to include.

If you missed a connection because the first flight was late, the contract governs whether you're rebooked for free—almost always yes when the airline caused the delay. If you missed your own flight for reasons on your end, that's a different situation; see Missed Your Flight? Here's Exactly What to Do Next.

Special Situations the Contract Covers

The contract of carriage also governs details people rarely check until they need them:

• Pets: Cabin vs. cargo rules, carrier dimensions, and breed restrictions all live in the contract. See Flying with a Pet: Airline Rules, Fees, and Tips before you book.
• Infants and children: Lap-child policies, bassinet availability, and unaccompanied-minor fees are defined here. Our guide to flying with a baby or infant translates the fine print.
• Involuntary schedule changes: The contract defines how far in advance and by how much a change must be before it triggers your refund rights.

Frequently Asked Questions

Is the contract of carriage legally binding?

Yes. When you buy a ticket you agree to it, and it's enforceable in court and through DOT. It's the airline's binding commitment—which also means the airline generally can't offer you less than what it promises there. Federal rules on refunds, bumping, and baggage sit on top of it and override any conflicting clause.

Can an airline change the contract of carriage after I book?

Airlines update their contracts periodically, but the terms in effect when you purchased your ticket generally govern that trip. Save a copy or note the version date at the time of booking if you anticipate a dispute.

Does the contract of carriage mean I get compensated for any delay?

No. There's no US law requiring cash payment for delays if you still fly. The contract may entitle you to meals, a hotel, or free rebooking for a "controllable" delay, but weather and air-traffic delays typically come with rebooking only. Your automatic cash refund right applies only if the flight is cancelled or significantly changed and you choose not to travel.

What if the gate agent contradicts the contract of carriage?

Politely show them the specific clause—having it screenshotted helps. If they still refuse, request the decision in writing, then escalate to customer relations and, if needed, file a DOT complaint. The airline is bound by its published contract, not by one employee's interpretation of it.