About

What this is

Air-passenger law is unusually generous and unusually badly explained. Under EU261 and UK261 a qualifying delay, cancellation or denied boarding pays a fixed sum set by law — €250 to €600, £220 to £520 — regardless of what the ticket cost. The Montreal Convention covers bags and delay losses on international flights. US DOT rules give you an automatic refund when a flight is cancelled or significantly changed. The airline must pay when you ask in writing and cite the rule. Claim companies charge a quarter to a third of the money for sending that one letter. This site gives you the letter.

How we check this

Every page follows the same method:

1. Primary sources only. The regulation text on EUR-Lex and legislation.gov.uk, Court of Justice judgments on CURIA, the UK CAA, the US DOT and the eCFR, ICAO for the Montreal Convention limits, the IMF for the SDR rate, the Canadian Transportation Agency for APPR. Never a claim agency’s blog, never a forum.
2. Every figure is registered. Each hard number on the site lives in one registry with its source, the date it took effect and the date we last checked it. A superseded figure — the old 1,288 SDR baggage limit, the old $775 bumping cap — cannot appear on a page without failing the build.
3. Dated, on the page. The pages that have been through this method print “figures checked <date>” under the title and list their sources at the end. A page whose check is more than six months old says so in a visible warning instead of pretending.
4. Letters never assert a number for you. The templates carry blanks like [Amount] and [Distance band]; the amounts page and the calculator tell you what goes in them, with the article of law next to it.
5. Uncertainty is written down. Where the law is contested (an infant on a lap ticket; Switzerland’s inbound limb; a national limitation period we could not source) the page says so and tells you who to ask, instead of filling the gap with a plausible number.

88 of 88 pages currently carry a check date; the newest check is 6 September 2026. The registry, the check script and the tests are part of the site’s source.

Who writes it

The flightclaimletters editorial team. We are not lawyers and this is not legal advice. We read the primary sources, keep the registry current, and write letters a stressed passenger can send in their own name. Nothing on this site is reviewed by a law firm and no page pretends otherwise. If money is at stake and the airline disputes the facts, take the file to your national enforcement body — here is the list — or to a lawyer.

How it is numbered

Every page has a file code — CL 02 is the second page in the Compensation Claims section. Sections: CL Compensation claims · AL By airline · RF Refunds & expenses · BG Baggage · RT Know your rights · XP Your situation, explained · EX If they refuse · CP Honest comparisons. New pages are appended to the end of their section, so a code you wrote down keeps pointing at the same page.

Privacy

No cookies, no analytics, no account. The letter builder and the calculator run entirely in your browser: what you type is kept in this tab’s session storage and is gone when you close it. A “copy link” from the calculator carries your airports, date and delay — never your name, booking reference or payment details. There is no server that could receive them.

How it pays for itself

Everything is free. Some outbound links — travel insurance, eSIMs, flight trackers — may be affiliate links; a commission never changes what a page says, and we take no share of any claim. We are not paid by airlines or by claim agencies. The disclosure has the details.

Corrections

If a figure on any page is wrong or out of date, the fastest fix is to tell us which page and which source contradicts it. The registry entry is corrected, the page’s check date is updated, and the change is noted on the page.