Aircraft wing above clouds on a long-distance flight

Calculation Methodology

Every number our calculator shows comes from published law. Here's exactly how it works.

1. Great-circle distance

We compute the shortest distance over the Earth's surface between airport coordinates using the haversine formula (Earth radius 6,371 km), as required by Article 7(4). For connecting journeys on one booking, we use first departure to final destination.

2. Distance bands

Band 1: up to 1,500 km — £220 / €250
Band 2: 1,500–3,500 km, and all intra-EU flights over 1,500 km — £350 / €400
Band 3: over 3,500 km — £520 / €600

3. Jurisdiction

EU261 applies to all flights departing the EU/EEA/Switzerland, and to flights arriving there on an EU-licensed airline. UK261 applies to all flights departing the UK, and to flights arriving in the UK on a UK or EU-licensed airline. See our jurisdiction matrix.

4. Delay measurement

Delay is measured at the final destination, from scheduled arrival to the moment at least one aircraft door opens (CJEU Germanwings v Henning, C-452/13). Three hours or more qualifies (Sturgeon, C-402/07). Long-haul delays of 3–4 hours receive 50% under Article 7(2).

5. Claims company comparison

The savings figure assumes a 35% commission plus 20% UK VAT — 42% of the total — which is typical of major claims management companies' headline fees. Some also add admin fees, which we do not include.

6. Duty of care

Regardless of compensation, airlines must provide meals and refreshments (from 2h short haul / 3h medium / 4h long haul), two communications, and hotel accommodation with transfers if an overnight stay is required.

7. Escalation routes

If an airline rejects your claim or fails to respond within 8 weeks, escalate to its approved ADR body (e.g. CEDR or AviationADR in the UK). If the airline is not in a scheme, contact the CAA's Passenger Advice and Complaints Team, the relevant EU national enforcement body, or use the small claims court.

Limitations

Results are estimates. We cannot verify actual flight times or causes. The calculator does not constitute legal advice.