How TravelStacks Gets Airlines to Pay (Without You Lifting a Finger)

How TravelStacks works to get airline payment comes down to one structural difference from a passenger filing alone: officially filed regulatory complaints carry enforcement weight that personal letters do not. When TravelStacks files your claim through the DOT portal, it enters the airline's regulated complaint tracking system. Airlines are legally required to respond to DOT-tracked complaints within 60 days and to report their resolution rates publicly. That accountability is why airlines respond to filed claims differently than to emails from individual passengers. For an overview of airline compensation rankings and which carriers respond well, see airline rankings.

Airlines report their DOT complaint response rates monthly. A complaint filed through the official portal counts against the airline's published compliance record in a way that a personal email does not.

A letter to an airline's customer service team enters a queue managed by an outsourced call center. Response time is measured in weeks. Resolution is at the agent's discretion. The agent's job is to minimize payout while keeping the customer from escalating further. There is no regulatory accountability for how that letter is resolved.

A DOT portal complaint is different. It is tracked in the Air Travel Consumer Report database. The airline must respond within the regulatory window. The resolution or non-resolution is recorded. Patterns of unresolved complaints are reviewed by DOT enforcement staff for potential civil penalty action. Airlines with poor compliance records face public reporting and enforcement risk. The same letter, filed through the official channel, has structural weight it did not have in the customer service queue.

For guidance on writing a direct complaint letter before escalating to a service, see how to write an airline complaint letter. For passengers who have already tried the letter and been denied, the filed complaint route is the natural escalation.

For US domestic and US-originating international flights, TravelStacks files through the DOT Air Consumer Protection portal. The filing includes the flight details, passenger documentation, the specific regulatory basis for the claim (involuntary bumping under 14 CFR Part 250, refund under the 2024 DOT Final Rule, or baggage compensation under DOT baggage liability rules), and a summary of the airline's prior response or non-response.

1. 1

   Passenger submits flight details and documentation through the TravelStacks claim form.

2. 2

   TravelStacks reviews the claim for regulatory eligibility and documents the legal basis.

3. 3

   Formal complaint filed through the official DOT portal with all supporting documentation.

4. 4

   Airline receives the officially routed complaint through its regulatory response system.

5. 5

   TravelStacks monitors for response within the 60-day window.

6. 6

   If the airline responds with payment, the claim is resolved and the passenger receives their amount minus the $19 flat fee.

7. 7

   If the airline responds with denial, TravelStacks reviews the denial for legal validity and prepares escalation.

The $19 flat fee is charged only on US DOT refund claims. EU261 and UK261 claims use a 25% of recovered compensation model because claim eligibility is less certain and the escalation work is more intensive.

For flights covered by EU Regulation 261/2004 (departing from an EU airport on any carrier, or arriving at an EU airport on an EU carrier), TravelStacks files with the National Enforcement Body (NEB) in the relevant member state. Each EU member state designates an NEB to handle EU261 complaints. The NEB has legal authority to compel airlines to pay and can impose sanctions for systematic non-compliance.

The relevant NEB depends on the departure country. For flights departing Germany, it is the Luftfahrt-Bundesamt (LBA). For Spain, the AESA. For France, the DGAC. For the UK (which is no longer EU but has equivalent UK261 legislation), it is the UK CAA. TravelStacks identifies the correct enforcement body for each claim and files through that body's formal complaint channel rather than the airline's voluntary customer service process.

For UK-originating flights, TravelStacks uses the UK CAA's Passenger Advice and Complaints Team (PACT) as the escalation pathway. PACT handles complaints against airlines that have not resolved a passenger claim through their internal process. Filing through PACT puts the complaint into the CAA's formal case management system, where airlines are required to respond and where unresolved cases can be escalated to enforcement action or alternative dispute resolution (ADR) through an approved scheme.

For claims that are denied by the airline at the PACT stage, TravelStacks coordinates referral to an approved ADR scheme (Civil Aviation Authority-approved, such as CEDR or Ombudsman Services: Transport). ADR decisions are binding on airlines that participate in the scheme. Most major UK-operating carriers are required to participate.

ADR decisions against airlines are binding. This is a stronger enforcement mechanism than the DOT complaint process, which produces administrative action rather than individual binding decisions.

Airlines sometimes fail to respond within the regulatory window. The follow-up process is where individual passengers typically give up and where TravelStacks' systematic approach produces results. When the DOT complaint receives no airline response within 60 days, TravelStacks files a follow-up complaint noting the non-response and requesting regulatory review. When an EU NEB filing receives no airline response within the NEB's standard window (typically 6 to 8 weeks), TravelStacks escalates within the NEB process.

The key difference between TravelStacks follow-up and individual passenger follow-up is volume and system. A single passenger following up on one complaint is easy for an airline to deprioritize. A compensation service filing hundreds of complaints and tracking each one's response rate creates a regulatory paper trail that enforcement staff can review as a pattern.

Escalation to formal enforcement is triggered by airline denial on incorrect legal grounds or by non-response after the standard regulatory window. TravelStacks does not escalate every claim: if the airline denies on legitimate grounds (for example, a genuine extraordinary circumstances defense on an EU261 claim with supporting documentation), the claim is evaluated on its merits. If the denial is legally incorrect or unsupported by documentation, TravelStacks escalates.

Escalation paths include: DOT formal enforcement referral, EU NEB escalation to binding ADR, UK CAA PACT referral to approved ADR scheme, and in cases with sufficient documentary evidence, referral to small claims court as a parallel track. Passengers never manage these escalation steps. They submit the form once and receive payment or a status update.

For EU261 claims, TravelStacks charges 25% of recovered compensation. On a EUR 600 claim, that is EUR 150. Passengers ask whether they should file themselves and keep the full amount. The honest answer is: it depends on whether you want to manage the process. Filing yourself through an EU NEB is free and produces the same outcome if the claim is straightforward. But NEB filings require understanding which body has jurisdiction, completing forms in the relevant language or in English where accepted, following up at each stage, responding to airline documentation requests, and potentially navigating ADR referral if the airline denies.

For most passengers, EUR 150 is a fair fee for not managing a 3 to 6 month administrative process across a foreign regulatory system. For passengers comfortable with the process, DIY is viable. TravelStacks is not the right choice for everyone and we say so. See is TravelStacks legit: how we work and what happens after you submit a flight claim. To start a claim, go to /claim.

TravelStacks is worth the 25% when the alternative is not filing at all or spending significant time managing a foreign regulatory process. If you are comfortable filing an EU NEB complaint yourself, do it.