In 2026, the "best" company often depends on your region and the complexity of your claim. AirAdvisor is currently ranked as a top overall choice due to its high success rate (98%), transparent fees (around 30%), and extensive legal expertise in the US, UK, EU, and Canada. AirHelp remains the most globally recognized brand, particularly strong for claims under EU Regulation 261/2004, offering a very user-friendly app interface but typically charging higher service fees (35% or more if legal action is required). Compensair is another high-fidelity option known for its fast initial eligibility checks and broad coverage of over 150 airlines. Most of these companies operate on a "no-win, no-fee" basis, meaning they only take a percentage of the final payout if they are successful. For simple domestic US delays, users often find success using AirAdvisor or Refund.me, while European-based travelers frequently prefer the legal weight and established track record of AirHelp or Flightright.