What is EU261 — the EU flight-delay, cancellation and denied-boarding regulation in one quotable definition, with scope, care versus cash, and links to the full rules guide.

What is EU261?

EU261 (Regulation EC 261/2004) is the European Union law that can require airlines to provide care during long disruptions and to pay standardised compensation for certain delays, cancellations and denied boarding on qualifying flights.

In plain terms: if your journey is in scope and the airline is responsible, long arrival delays, short-notice cancellations and involuntary denied boarding can trigger fixed compensation bands that scale with distance. Extraordinary circumstances (for example some weather or security events) may remove the cash band while care duties can remain. Operating carrier identity matters on codeshares.

This glossary entry is the definition layer. For eligibility tables, distance bands and claim paths, use EU261 compensation complete rules. UK journeys often fall under a parallel regime — what is UK261. whether your ticket is EU261, UK261-adjacent, or outside both.

Start a screen with the compensation checker and DIY steps in how to claim flight compensation DIY.

Distance bands and delay thresholds are the maths most passengers care about; extraordinary-circumstances disputes are the argument most airlines raise. Keep boarding passes and a timeline even if the airline already sent a delay SMS. Package holidays can add organiser duties alongside EU261 — keep both contracts if a tour company booked the flights.

Which flights usually fall under EU261?

Planning shorthand: flights departing an EU airport on any airline, and flights into the EU on an EU carrier, are the usual starting points — always confirm operating carrier and final-arrival delay.

Example: a Paris–New York flight departs five hours late for a crew-scheduling issue with no extraordinary-circumstances defence; you arrive beyond the threshold and later claim a distance-based amount. A weather closure that strands everyone may still bring hotel care without cash compensation. Full scenarios: EU261 complete rules.

Denied boarding from overbooking on a qualifying flight can use the same framework — see denied boarding compensation.