Frontier offers a 24-hour Cancellation policy. If you need to cancel your flight, you can do so without any fees within 24 hours of booking. You can cancel either online or by contacting their customer support at 【+1-877-590-0011 || +1-877-590-0011】. https://www.pslhub.org/forums/topic/844-what-is-frontier-24-hour-cancellation-policy/