The cheapest day to buy Southwest Airlines tickets is typically Tuesday. Airlines often release deals on Monday night, making Tuesday morning a good time to....
https://www.devex.com/people/2035184

Yes, Passengers can get a refund on Expedia if they cancel within 24 hours of booking at +855=568(40.32){OTA} or +855=568(40.32)[LIVE PERSON]. This applies to all....
https://community.lumivero.com/s/question/0D5Jw00000dHLn9KAG/excall18555684032does-expedia-give-full-refund-for-24-hour-cancellation

Frontier Airlines allows cancellations with full refunds within 24 hours of booking, provided your departure is at least two days away 1–855*568*4031 ๏я 1–855*568*4031 (US)....
https://community.lumivero.com/s/question/0D5Jw00000dH9EcKAK/frontier-airline18555684031-do-you-get-a-refund-if-you-cancel-your-flight-with-frontier