The Warsaw Convention: What It Says and What It Means for Passengers Injured on International Flights

If an Airline Letter Mentions the Warsaw Convention

The treaty's full name is the Convention for the Unification of Certain Rules Relating to International Carriage by Air, signed at Warsaw in 1929. It replaced a patchwork of national laws with one set of rules shared by every country that joined it. Before it, an injured passenger's rights could depend on whichever country's law a court chose to apply.

The Convention covered an airline's liability for passenger injury and death, for lost baggage, and for damaged cargo. Article 17 is the source of the carrier's liability for passenger death or bodily injury. The United States became a party to the treaty, and for decades it governed claims arising from international airline travel to and from this country.

Whether the treaty reaches your trip depends on its route. It applies only to international carriage: if your flight departed from one country and was headed to another, or your trip included an agreed stopping place in a country other than the one you left from, the treaty can apply. That means a round trip that starts and ends in the same country can still qualify if the booked itinerary included a stop abroad.

Two later instruments changed the Warsaw rules. The Hague Protocol, signed at The Hague on September 28, 1955, amended the Convention. The Montreal Agreement of 1966 was a private agreement among carriers, not a treaty between countries, that supplemented Warsaw. It is separate from the Montreal Convention of 1999, discussed below.

For a family, this history matters because the governing treaty sets the liability rules and any ceiling on damages. The countries of departure and destination and the date of travel are the starting facts, and they are usually where a conversation with an attorney begins.

When an Injury Is Serious but Recovery Was Capped

Article 22 of the Warsaw Convention set the liability cap for passenger death or bodily injury at 125,000 Poincaré gold francs per passenger, a currency unit defined by a fixed amount of gold. The Hague Protocol doubled that cap to 250,000 Poincaré gold francs. Under the Montreal Agreement of 1966, signatory carriers agreed to a higher limit, approximately $75,000 per passenger including legal fees, or $58,000 excluding them, for flights to, from, or with an agreed stopping place in the United States.

For an injured passenger or family, the cap set a ceiling on what could be recovered from the airline no matter how serious the harm. A catastrophic injury and a minor one could run into the same limit.

The fault rule worked in the passenger's favor in one way. The carrier was presumed liable, and it could escape liability only by proving that it and its agents took all necessary measures to avoid the damage, or that it was impossible to take them. The passenger did not begin by proving the airline was careless.

Article 25 offered the main path past the cap. If the damage was caused by willful misconduct of the carrier or its servants acting within the scope of their employment, the cap did not apply. Willful misconduct is a demanding standard, far beyond ordinary carelessness, and whether it can be shown depends entirely on the facts.

Article 29 added a two-year time limit, discussed in the evidence section below. If a Warsaw claim is in play, whether the cap applies, whether it can be broken, and when the two years began are each questions an attorney can help sort out from the specific flight and claim.

The Montreal Convention of 1999 and Why It Matters Now

The successor treaty is the Convention for the Unification of Certain Rules for International Carriage by Air, done at Montreal on May 28, 1999. The United States ratified it, and it entered into force for the United States on November 4, 2003. Between countries that have both ratified it, the Montreal Convention replaces the Warsaw system.

The biggest change is that the fixed cap for passenger death or bodily injury is gone. Article 17 of the Montreal Convention keeps the carrier's liability for death or bodily injury, and Article 21 replaces the old ceiling with a two-tier system. The amounts are stated in Special Drawing Rights (SDRs), a unit of account set by the International Monetary Fund based on a basket of currencies.

In the first tier, up to 100,000 SDRs, liability is strict: the carrier cannot avoid it by showing it was careful. Above that threshold there is no fixed limit, but the carrier is not liable for the amount above 100,000 SDRs if it proves the damage was not due to its negligence. The burden is on the airline, not the passenger. Article 35 carries forward the same two-year limitation structure.

For a family after an international airline accident, this is the most important practical point on this page. Most international flights involving the United States today fall under Montreal, so if an older article or an airline letter describes a fixed Warsaw cap, it may not reflect the rules that govern your flight. The Warsaw system still governs flights between countries where one has not ratified Montreal, so both countries' treaty status on the date of the flight matters.

If Your Trip Involved Connections, Codeshares or a Foreign Carrier

The starting rule: the Montreal Convention applies when both the country of departure and the country of destination, or of an agreed stopping place, are parties to it. If one has not ratified Montreal, the Warsaw system may still apply, in whichever form the two countries share: the original Convention, the Convention as amended by the Hague Protocol, or the Montreal Agreement arrangements.

Real itineraries complicate this. If one airline sold your ticket and another operated the aircraft, as on a codeshare, a question arises about which carrier the treaty treats as responsible. If you flew a leg that looked domestic as part of a trip booked with a foreign destination or stop, that leg can be international carriage.

The governing treaty also decides where you can file suit. Under Article 28 of the Warsaw Convention, a passenger can sue in one of four places: the court of the carrier's domicile, the carrier's principal place of business, the place of business through which the contract was made, or the place of destination. Article 33 of the Montreal Convention keeps those four and adds a fifth: the passenger's principal and permanent residence, under conditions the article sets out. If you live in the United States and were hurt on a foreign carrier, that fifth option can determine whether a U.S. court is available at all.

The facts that usually bear on the answer are the date of travel, the full itinerary as booked, the ticketing carrier, and the operating carrier. Families often find the original booking confirmation and e-ticket receipt more useful than the boarding pass alone, because they show the journey as it was contracted. If you would like to talk through which treaty may govern a particular flight, you can request a case evaluation.

If You Are Considering a State-Law Claim

Within their scope, the Warsaw and Montreal Conventions are exclusive. If your claim falls within the treaty, the treaty's rules are the only route to recovery: that is what the U.S. Supreme Court held in El Al Israel Airlines, Ltd. v. Tsui Yuan Tseng, 525 U.S. 155 (1999), finding the Warsaw Convention's remedial scheme the exclusive remedy for claims within its scope. State and federal common-law claims covering the same ground are preempted, so an ordinary state negligence claim cannot be used to step around the treaty.

In practical terms, if you have filed, or are thinking about filing, a state-court negligence claim over an international flight, that claim may not be available if the treaty covers it. The treaty's rules would control instead, including any cap or two-tier limit, its liability standard, and its two-year period. An attorney can help assess whether a claim sits inside the treaty before that question shapes the case.

Claims outside the treaty's scope are different. A purely domestic flight is not international carriage, so neither treaty governs it, and state tort law applies. That covers most small-aircraft, charter, air tour and training accidents; the pages on charter flight crashes, sightseeing flight accidents and a plane crash lawsuit explain how those cases generally work. Claims against parties other than the carrier, or injuries outside the treaty's categories, may also be governed by state law.

Where state law applies, limitation periods, comparative fault rules and damages rules differ from state to state. Whether a claim falls inside or outside the treaty depends on the nature of the injury and the circumstances of the flight, and it is often the first question in an international case.

Evidence and the Two-Year Period: What Passengers and Families Often Gather

Both treaties set a two-year period for bringing suit. Article 29 of the Warsaw Convention and Article 35 of the Montreal Convention each run the period from the date of arrival at the destination, the date the aircraft was scheduled to arrive, or the date the carriage stopped. Courts have generally treated this period as a condition of liability rather than an ordinary procedural statute of limitations, which means it is strictly enforced and is not paused in the ways some state limitation periods can be.

Two features surprise many people. If the period is missed, the claim is extinguished. And it runs from a date tied to the flight itself, not from the day a passenger learned how serious an injury was. An injury that seems minor on arrival and worsens months later does not reset the clock. Which date starts the period in a given case depends on the facts of the flight.

The records that usually matter pin down the journey and the harm. Injured passengers and families often keep:

• the ticket, booking confirmation and full itinerary, which show the countries and the contracting carrier;
• boarding passes, which show the flights actually taken;
• medical records that document the injury and when it was first treated;
• any incident report made to the airline during or after the flight;
• photographs of the injury, the cabin or damaged property;
• names and contact information for fellow passengers or others who saw what happened.

These documents answer the questions the treaties ask: where the trip began and ended, who carried the passenger, what happened on board or during embarking and disembarking, and when. For a family after a death, the same records help establish the itinerary and timeline that both the treaty analysis and the two-year period depend on.