Why Do Airlines Overbook Flights?
Overbooking is a deliberate commercial practice. Airlines sell more tickets than there are seats on the plane, banking on the fact that some passengers will always be no-shows. Most of the time this works out — but occasionally, more passengers show up than expected, and someone has to be left behind. This is known as being denied boarding.
The practice is legal, but airlines are required to compensate passengers who are involuntarily bumped as a result.
Voluntary vs. Involuntary Denial of Boarding
When a flight is overbooked, airlines are first required to ask for volunteers to give up their seats in exchange for benefits (travel vouchers, miles, cash, or a later flight). If enough volunteers come forward, no one is forced off the plane.
If you're considering volunteering, make sure you:
- Negotiate the benefits — don't accept the first offer
- Get the compensation in writing before giving up your seat
- Confirm your alternative flight is confirmed and not waitlisted
- Ask whether your right to EU261 cash compensation still applies
If you are involuntarily denied boarding — meaning the airline selects you without your consent — you have full legal protections.
Your Rights Under EU261 for Denied Boarding
Involuntary denied boarding triggers the same compensation structure as flight cancellations under EU261:
| Flight Distance | Compensation |
|---|---|
| Up to 1,500 km | €250 |
| 1,500–3,500 km | €400 |
| Over 3,500 km | €600 |
These amounts may be reduced by 50% if the airline offers re-routing and you arrive within a certain window of your original arrival time. Crucially, there is no "extraordinary circumstances" defence for overbooking — the airline cannot avoid paying.
Right to Choose: Refund or Re-routing
Just as with cancellations, you must be given a genuine choice between:
- A full refund of your ticket price, paid within 7 days
- Re-routing as soon as possible to your final destination
- Re-routing at a later date at your convenience
Do not let the airline pressure you into accepting an alternative they've already chosen for you without offering these options first.
Right to Care While You Wait
If you're denied boarding and waiting for a new flight, the airline must provide meals, refreshments, and communication allowance proportionate to your wait. If an overnight stay is required, they must cover hotel accommodation and transport to and from the hotel.
US Passengers: DOT Rules on Bumping
In the United States, the Department of Transportation (DOT) has its own rules on overbooking. If you're involuntarily bumped on a domestic US flight and the airline arranges alternative transport that arrives:
- 1–2 hours late: 200% of one-way fare (up to $775)
- 2+ hours late: 400% of one-way fare (up to $1,550)
For international flights departing the US, the thresholds are 1–4 hours and 4+ hours respectively. Payment must be made on the spot.
What to Do If You're Bumped
- Ask for written confirmation that you have been denied boarding involuntarily
- Ask the airline which regulation applies to your claim and for the compensation amount
- Do not sign any waiver of rights without fully understanding what you're agreeing to
- Keep all boarding passes, receipts, and communications
- File your claim in writing within a few days of returning home