I haven't used it but according to their FAQ, the smart contract uses publicly available flight data from multiple government sources to determine if a flight i

I haven't used it but according to their FAQ, the smart contract uses publicly available flight data from multiple government sources to determine if a flight is delayed. The payout is based solely on that and the decision is out of Axa's hands (their website specifically says: payout regardless of reason for delay, including alien attack). You can sign-up for the cover up to 15 days before departure. Apparently you input your flight number and credit card details. If the flight ends up being delayed more than 2 hours, their smart contract triggers an automatic payout to your card, no questions asked.