Denied boarding: your rights when the flight is oversold

Denied boarding is the one form of disruption where the compensation is due before you have lost a single minute. This guide explains the legal difference between volunteering and being bumped, why the entitlement starts immediately rather than after three hours, how the half rate works when the airline gets you there quickly, what the airline owes you while you wait, and precisely what to do and say at the gate while the situation is still live.

Volunteers first, then involuntary denial

Airlines routinely sell more seats than the aircraft holds, on the actuarial assumption that a predictable share of passengers will not turn up. When the maths fails, someone has to be left behind, and the regulation sets out a two-stage procedure the airline must follow. Overbooking is not the only cause: an aircraft swap to a smaller type, a weight restriction, or crew needing to travel as passengers can all produce the same outcome, and the legal treatment is identical.

Article 4(1) of Regulation 261/2004 requires the airline, when it reasonably expects to deny boarding, to call for volunteers to surrender their reservations in exchange for benefits before it refuses anyone. Only if not enough people come forward may it deny boarding against a passenger's will. Both limbs are in the text on EUR-Lex, and the assimilated UK version is on legislation.gov.uk.

Volunteering

If you volunteer, you are negotiating. The regulation does not fix what you get, which means the ground staff have discretion and the first offer is rarely the last. Vouchers, upgrades, lounge access, a hotel and a rebooking are all common. What matters legally is that by agreeing you replace the fixed Article 7 compensation with whatever you accept, so a £150 voucher instead of a £520 entitlement is a poor trade you cannot easily undo later. Ask what the involuntary figure would be before you decide, get the offer in writing or on the app, and remember that you keep your right to a refund or rerouting on top of the benefits.

Being bumped

If you did not agree, you were denied boarding involuntarily, and Article 4(3) is blunt about what follows. The airline must immediately compensate you under Article 7, and assist you under Article 8 - the choice between a refund and rerouting - and Article 9, the duty of care. Nothing in that sentence is conditional on how long you are eventually delayed.

The compensation starts at zero hours late

This is the single most useful thing to know at the gate. On a delay claim the whole case turns on whether you reached your final destination three or more hours late. On a denied boarding claim the entitlement crystallises when you are refused, so an airline that puts you on a flight ninety minutes later still owes you money. The delay figure only affects how much.

Nor can the airline rely on extraordinary circumstances in the ordinary way. Overbooking is a commercial decision the carrier made itself, which is the opposite of an event outside its control, so the defence discussed in extraordinary circumstances explained has almost no purchase here.

The Article 7(2) half rate

Article 7(2) lets the airline halve the compensation if it reroutes you and you arrive within a set number of hours of your original scheduled arrival. The threshold rises with distance.

Read the thresholds as a ceiling rather than a floor. Arrive inside the window and the amount halves. Arrive outside it, by any margin, and the full amount is due. Which currency applies depends on which regime covers the route, explained in UK261 vs EU261, and the compensation checker will pick the band and apply the halving for you.

A worked example

Two passengers are bumped off an oversold flight from Manchester to Dubai, a route comfortably over 3,500 km. The airline rebooks them via another hub and they land three hours and twenty minutes after the original scheduled arrival. That is inside the four-hour window, so the half rate applies and the claim is £260 each, £520 for the two of them, plus anything they spent on food during the wait.

Had the rebooking landed them four hours and five minutes late, thirty-five minutes later, the half rate would not apply and the claim would be £520 each, £1,040 in total. The difference between those two outcomes is not the airline's good faith but the clock, which is why the actual arrival time is worth recording carefully at the time.

When it is not denied boarding

The regulation carves out reasonable grounds for refusing boarding, and those refusals carry no compensation. They cover health and safety concerns, security, and inadequate travel documentation - a passport with too little validity left for the destination, or a missing visa or travel authorisation. The protection also requires you to have presented for check-in on time with a confirmed booking, or, where the airline stated no check-in time, at least 45 minutes before departure. Missing a connection because an earlier flight ran late is a different claim entirely, treated as a delay to your final destination.

What to do at the gate

1. Do not volunteer before you know the numbers. Ask the agent what the fixed compensation would be if you were denied boarding involuntarily, then compare.
2. Say clearly that you do not consent. If you are being bumped anyway, make it explicit that you are not volunteering, and note the time you said it.
3. Ask for the written notice. Airlines are required to give denied boarding passengers a written statement of their rights. Ask for it and keep it.
4. Get the reason in writing. Oversold, aircraft change, weight restriction. A photo of the gate screen or a message in the airline app is enough.
5. Choose refund or rerouting deliberately. You have the right to a full refund with a flight back to your first departure point if the journey no longer serves any purpose, or to rerouting at the earliest opportunity.
6. Claim care as you go. Meals, drinks and a hotel if it runs overnight, with receipts if the airline provides nothing.

Care and assistance while you wait

Article 9 applies from the moment you are denied boarding, so meals and refreshments in reasonable relation to the waiting time, two communications, and hotel accommodation with transfers if the rebooking is the next day. It is owed whether or not you volunteered. Full detail is in duty of care.

If the airline pays nothing, the process from here is the same as any other claim. Put it in writing with the flight details, the fact that you were denied boarding involuntarily, the arrival time of the rebooking and the figure you want, as set out in claiming it yourself, for free, and escalate through ADR or the CAA if the answer is no.