How EU261 No Win No Fee Services Work (And What They Actually Charge)

• ›

  AirHelp: 25-35% of your EU261 payout, no upfront cost, handles EU261 and UK261 enforcement

• ›

  Flightright: Approximately 27% of your EU261 payout, focused on EU-origin flights and German-speaking markets

• ›

  TravelStacks: 25% of EU261 and UK261 recoveries, plus a $19 flat fee for US DOT refund claims (separate from EU261)

• ›

  DIY filing: Free, but requires documentation, persistence, and potentially filing with a national enforcement body or court

• ›

  Bottom line: No win no fee services are worth the percentage when the airline denies your claim or you want someone else to handle the legal escalation

A no win no fee service (also called conditional fee or success-fee model) means the claim company only collects a fee if they successfully recover compensation for you. If the airline refuses and the service cannot enforce the claim, you owe nothing. The service absorbs the legal costs and effort of escalation.

The catch: The fee is taken from your compensation, not from the airline. If your EU261 entitlement is 400 EUR and the service charges 25%, you receive 300 EUR. The service keeps 100 EUR. The airline pays 400 EUR regardless.

This model works well for passengers who have a valid EU261 claim but do not want to deal with denial letters, national enforcement bodies, or small claims court. The service handles all of that in exchange for a share of the recovery.

Most EU261 claim services operate on a contingency basis. You assign your claim to the service (via a power of attorney or claim assignment), the service contacts the airline on your behalf, and if compensation is paid, the service deducts their percentage and forwards the remainder to you.

• ›

  Assignment model: You transfer your legal right to the claim. The service becomes the claimant and keeps any compensation above their fee.

• ›

  Agency model: You remain the claimant. The service acts as your agent and deducts a fee from what the airline pays you.

• ›

  Legal enforcement: If the airline refuses, the service may escalate to an Alternative Dispute Resolution (ADR) body or court. In this case, the airline may also be required to pay legal costs separately.

For US-based travelers with EU261 rights (on EU-carrier flights or EU-departing flights), services like TravelStacks handle both EU261 claims and US DOT refund claims. The fee structure differs: EU261 uses the 25% model while US DOT claims have a $19 flat fee.

EU Regulation 261/2004 sets fixed compensation amounts based on flight distance. These amounts are per passenger, regardless of ticket price:

• ›

  250 EUR: Flights under 1,500 km (for delays of 3 or more hours, cancellations, or denied boarding)

• ›

  400 EUR: Flights between 1,500 km and 3,500 km

• ›

  600 EUR: Flights over 3,500 km (such as transatlantic routes)

At 25%, a 250 EUR claim costs you 62.50 EUR in fees. A 600 EUR claim costs 150 EUR. The EU261 amounts have not changed since the regulation took effect in 2005. For a full breakdown of who qualifies, see the EU261 rights guide.

UK261 note: After Brexit, the UK implemented its own equivalent regulation (UK261) with the same compensation amounts in GBP. See the UK261 guide for UK-specific rules.

The percentage fee is clearly worth paying in these situations:

• ›

  The airline has already denied your claim or ignored your first letter

• ›

  The airline cited extraordinary circumstances and you are not sure whether that defense applies

• ›

  You do not want to navigate a foreign ADR system or court in another country

• ›

  Your claim is on a codeshare or connecting flight where liability is disputed (see the codeshare compensation guide)

• ›

  You filed DIY and received a voucher when you are entitled to cash

For straightforward claims where the airline has already acknowledged the cancellation, DIY filing at the airline's website or through the national enforcement body costs nothing. The service fee only makes economic sense if there is a real risk the airline will dispute your claim.

The main factors when comparing EU261 no win no fee services are the percentage charged, the geographic scope of enforcement, and whether they also handle US DOT claims.

1. 1

   Check the fee percentage. TravelStacks charges 25%, Flightright approximately 27%, AirHelp 25-35% depending on case complexity. On a 600 EUR claim, the difference between 25% and 35% is 60 EUR.

2. 2

   Confirm your route qualifies. EU261 covers flights departing the EU (any airline) or arriving in the EU on an EU-carrier. See which routes qualify.

3. 3

   Look at their enforcement track record. Services that take cases to court have more leverage with airlines that routinely deny claims.

4. 4

   Check if they handle US DOT claims. If your disruption involved a US domestic leg or a DOT-covered situation, you want a service that can handle both jurisdictions at once.

The claim timeline varies by airline and case complexity. Most services take 4-12 weeks for straightforward claims where the airline does not contest. Disputed cases that go to ADR or court can take 6-12 months or longer.

Statute of limitations: EU261 claims must be filed within the statute of limitations of the country where the flight departed (or arrived, for arrivals). This ranges from 1 year (some countries) to 6 years (England and Wales). Do not wait if your disruption was recent.

TravelStacks accepts EU261 and UK261 claims through the standard claim filing flow. For US-origin passengers with EU261 rights on transatlantic flights, the process is the same. Check the airline rankings page for disruption data on specific carriers.