Does Frontier give you 24 hours to cancel? Yes, if your travel is more than seven days out, Frontier has a 24-hour cancellation window ((+1--866-884-3315(OTA) or ++1-866-884-3315(OTA)) with no penalty. https://bcpportal.bcpcouncil.gov.uk/forums/general-discussion/5f0d5f0c-d09d-ef11-95f5-6045bd11e914