A flight delay compensation calculator can answer one question reliably: whether your itinerary falls under EU261 or UK261, and what the distance band is worth. It needs arrival delay at the final destination, not departure delay, and the whole journey’s distance, not the delayed leg’s.
What no calculator shows you is what happens when the airline says no. Extraordinary-circumstances defences and the choice between an ADR scheme and small claims court decide most claims — and neither appears on the screen.
- What a flight delay compensation calculator can and cannot determine
- The two inputs that decide the payout
- Extraordinary circumstances: the checkbox that decides most claims
- Connecting flights, multi-leg trips, and the distance that counts
- When the airline says no: ADR schemes, enforcement bodies and court
- Why “a strike happened” was never the end of the argument
- What this means for you
- Key terms
Run a delay through a flight delay compensation calculator and you get an answer in about thirty seconds. A few hundred euros, or nothing at all. Either way, the tool has done its job and then handed you back a problem it was never built to solve.
Understand the asymmetry before you start. The calculator models the regulation. It does not model the airline.
Regulation 261/2004 and its UK equivalent are published arithmetic — fixed sums set by distance, a three-hour arrival threshold, and a written exemption the carrier has to prove rather than assert.
An airline’s response to your claim is none of those things. It’s a judgement call made by a department you can’t see, using evidence you may never be shown.
So treat the calculator as stage one. Stage one tells you whether a claim exists at all. Stage two — the documentation and the dispute path — is where claims actually die, and it’s where most people stop reading.
This piece covers both stages, and spends most of its time on the second.
What a flight delay compensation calculator can and cannot determine
A useful calculator asks for four things: origin, destination, scheduled arrival at the final destination, and actual arrival at that same point. Give it anything less and the output is guesswork.
Sanity-check the tool before you trust it. If it wants departure delay, or applies the delayed leg’s distance rather than the whole journey, the number is wrong. Those are the two errors that matter most, and they’re common.
What it can’t do is predict the airline’s answer. The regulation sets a payout; the carrier decides whether to pay it.
Some trips have nothing to calculate. On a purely domestic U.S. itinerary there’s no fixed cash figure for a delay — the U.S. Department of Transportation requires refunds in defined circumstances, generally within seven business days for credit-card purchases and twenty calendar days otherwise, but it stops short of mandating EU-style delay compensation. Tokyo–Sydney and Singapore–Bangkok are the same story.
For those itineraries, check refund eligibility, not compensation.
The two inputs that decide the payout
Distance and lateness set the money. Nothing else does.
The first input is when you arrived, not when you left. Fixed compensation under EU261 is triggered once arrival at the final destination is at least three hours late. Departure delay is irrelevant, and passengers trip over this more than any other point in the regulation.
The second is how far the flight went. €250 covers flights up to 1,500 km. €400 covers intra-EU flights beyond 1,500 km, plus other flights between 1,500 and 3,500 km.
€600 applies above 3,500 km. Those bands are mutually exclusive — a claim sits in one of them.
UK261 mirrors the structure in pounds rather than euros. The two regimes also differ on limitation periods and dispute channels, and EU261 sets no single court deadline of its own. Whether they diverge in any other way that changes a calculator’s output isn’t settled by the published material.
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Extraordinary circumstances: the checkbox that decides most claims
Most calculators reduce this to one checkbox, which is like reducing a court case to a yes/no. The real test sits in Article 5(3) of Regulation 261/2004, and the burden is the airline’s: it must show an extraordinary event occurred, that the disruption followed from it, and that no reasonable measure could have prevented the consequence.
Proof isn’t a label. EU guidance points to logbook extracts, incident reports, external documents and statements, and says that material should be handed to the passenger or the enforcement body. A rejection that says “technical problem” and stops there is not the proof that guidance describes.
Crew shortages and technical faults usually sit inside an airline’s ordinary operational activity, so they rarely qualify as extraordinary. This is where vague rejections most often fall apart. If your letter names neither a specific event nor how it caused the delay, that’s a question worth asking — in writing.
Strikes and severe weather can genuinely release an airline from the cash. Care and assistance don’t disappear with the payment.
Connecting flights, multi-leg trips, and the distance that counts
One reservation changes the arithmetic. When a single booking covers a multi-leg trip, the compensation band is set by the whole journey’s distance, and the delay is clocked at the final destination. The delayed leg’s own length decides nothing.
A Lisbon–Frankfurt–Singapore ticket on one reservation is a long-haul journey for these purposes, not a short European hop followed by a long one. A two-hour delay on the first leg that leaves you arriving in Singapore five hours late is a top-band claim.
Booking policy is where it gets murky. Whether a carrier treats a self-transfer or a rebooked itinerary as one contract varies, and no current carrier-by-carrier comparison of those rules could be verified. The single-reservation principle holds; the airline-specific variations need confirming with the carrier.
When the airline says no: ADR schemes, enforcement bodies and court
The first stop is always the airline, and the first thing worth keeping is its written reason. Everything downstream depends on what that letter does and doesn’t say.
If the reply never comes, or arrives without answering the point, three routes open: a national enforcement body, an ADR provider, or a court. In the UK, CAA-approved ADR reviews the file independently and generally decides within three months, free of charge. Access turns on your airline belonging to the relevant scheme — where it doesn’t, the CAA’s PACT service can look at the complaint but cannot impose a decision on the carrier.
Court sidesteps the membership question and ends in a judgment, with fees, procedure and limitation rules that vary by jurisdiction.
| Jurisdiction or route | ADR or dispute body | Airline participation | Passenger cost | Escalation time limit | Binding outcome |
|---|---|---|---|---|---|
| United Kingdom — CAA-approved ADR | Approved aviation ADR provider; provider depends on the airline | Only where the airline belongs to the relevant scheme; CAA PACT can review but cannot impose a solution | Free to use | Complaint generally within 12 months of the airline’s final response; incidents generally accepted within six years, five in Scotland | Generally final; approved ADR results bind the airline when the consumer accepts the decision |
| United Kingdom — small claims court | Civil courts; route and jurisdiction depend on the claim | No voluntary airline membership required | Court fees and possible litigation costs apply | No single EU261 deadline; limitation depends on the applicable UK jurisdiction | Binding, subject to appeal rules |
| Spain — passenger ADR/enforcement route | Spanish government passenger-rights authority and designated dispute procedure | Retrieved official material states the ADR decision binds air carriers | No fee figure stated in the retrieved material | For incidents dated January 6, 2023 or earlier: escalation after more than one month without an airline answer | Binding on air carriers per the retrieved government material |
| EU/EEA — national enforcement body route | The body designated by the country where the incident occurred | Can address regulatory compliance; not a substitute for a damages court everywhere | Generally no passenger fee stated in the EU guidance | EU261 sets no uniform court-action deadline; national limitation rules apply | Varies by national procedure; not equivalent to a court judgment |
| EU/EEA — consumer ADR where available | ADR entity under the national ADR framework | Where the airline is established in the EU and participates in the scheme | Most entities are free for consumers, per comparative consumer-centre material | Varies by national scheme; check with the relevant provider | Varies by scheme; not every determination binds both parties |
| Source: UK Civil Aviation Authority; European Union; Spanish Government; European Consumer Centres Network | |||||
Read the table for the contrast that matters. The UK ADR row is the only route that is both free and binding on the airline once the consumer accepts. The enforcement-body route looks similar and isn’t — it addresses regulatory compliance, not damages.
Spain’s procedure is the outlier in the other direction, with official material stating its decisions bind carriers.
No source establishes how often airlines reject on extraordinary-circumstances grounds, or how ADR outcomes compare with small-claims outcomes. Treat any percentage claiming one route wins more often than the other as unverified.
Why “a strike happened” was never the end of the argument
A Norwegian complaint against KLM ended up before the EFTA Surveillance Authority, and the facts were not subtle: a third-party airport strike, and a flight arriving more than 12 hours behind schedule. The Oslo District Court, ruling in February 2022, read the strike as enough to exempt the carrier.
The Authority disagreed that the matter closed there. Whether the strike actually caused the late arrival, and whether the carrier took every reasonable step to limit the damage, also had to be examined — and documenting both, the decision stressed, was the airline’s job, not the passenger’s. The case is College Decision 076/2024/COL.
That’s the shape of the test in practice. An event that looks extraordinary on its face still has to be tied to your specific delay, and the airline’s own file has to show the mitigation attempt.
The precedent involves a strike, not a technical fault or a crew shortage, so it isn’t a template for those. But it shows why ticking a box can’t close a file.
What this means for you
File with the operating airline, and file directly. Claim-manager commissions are a commercial contract term, not something the regulation requires — the direct route costs nothing and the full payout stays with you.
Keep the paper trail from the airport onward: booking confirmation, boarding passes, receipts for anything you had to buy, the delay communications, and the airline’s written reason. If that reason is vague, ask for the specific evidence behind it. The airline carries the burden of proving the exemption, not you.
Reporting by
Key terms
- EU261
- EU261 is the shorthand for Regulation 261/2004, the EU rule that sets fixed cash compensation for qualifying flight delays. Its payouts are fixed by distance band — €250 up to 1,500 km, €400 for intra-EU flights beyond that and other flights up to 3,500 km, and €600 above 3,500 km. Because the regulation sets no single court deadline of its own, a claim’s real expiry date depends on national limitation rules rather than anything a calculator can show.
- UK261
- UK261 is the UK’s version of the EU flight-compensation regime, applied after Brexit. It mirrors EU261’s structure but pays in pounds rather than euros. The two regimes also differ on limitation periods and dispute channels, so the same delay can produce different outcomes depending on which one governs the ticket.
- ADR
- ADR, or alternative dispute resolution, is an out-of-court route for settling a compensation claim through an independent provider. In the UK, CAA-approved ADR reviews the file independently and generally decides within three months, free of charge. Access depends on the airline belonging to the relevant scheme, which is why the ADR route can be closed to a passenger even when the claim itself is sound.
- National enforcement body
- A national enforcement body is the regulator designated by a country to handle passenger-rights complaints under EU261. It can address whether an airline complied with the regulation, but it is not a substitute for a damages court everywhere. That distinction matters because an enforcement-body ruling looks like a decision yet may not carry the binding force of a judgment.
Questions? Answers.
After how many hours of flight delay will I receive compensation?
Three hours, measured on arrival at the final destination rather than at departure. Once that threshold is crossed, and no valid extraordinary-circumstances defence applies, the fixed amount is set by the flight’s distance band.
What is the 2 hour rule for flights?
There is no two-hour compensation trigger. Fixed cash turns on the three-hour arrival threshold and the distance band, while care and assistance — meals, refreshments and accommodation where needed — sit on a separate footing and remain owed even when an airline successfully argues extraordinary circumstances.
What are my rights if my flight is delayed?
Fixed compensation once arrival at the final destination is three hours or more late, unless the airline proves an extraordinary circumstance. Care and assistance are owed regardless of that defence. In the UK, escalation to CAA-approved ADR is generally free to the passenger.
What flight delays are eligible for compensation?
Arrival at the final destination three hours or more behind schedule on a covered EU261 or UK261 itinerary. The amount depends on distance: €250 up to 1,500 km, €400 for intra-EU flights beyond that and other flights up to 3,500 km, and €600 above 3,500 km. To avoid paying, the airline must prove the extraordinary event, its link to the delay, and that reasonable measures could not have avoided the consequence.
Can I claim directly with the airline instead of paying a claim manager?
Yes. Third-party commissions are a commercial contract term, not a statutory requirement — nothing in the regulation obliges you to use a claim manager. Filing directly with the operating airline costs nothing and preserves the full payout.
