Will I be charged a fee to cancel my reservation?

Within 24 hours of purchase:  If the date of travel is outside of 7 days, all tickets may be canceled for a full refund up to 24 hours from the time of purchase. No cancellation fee applies. You can request a refund on your Manage my Booking page by logging into My Trips. Note: Tickets purchased within 7 days of travel will be held as credit and are subject 
Beyond 24 hours from purchase: If it has been more than 24 hours since you purchased your ticket, or the booking was made within 7 days of travel, a cancellation fee may apply and can be found here. The value of your ticket, less non refundable charges or fees, may be applied toward the purchase of a future ticket. To cancel your booking, log into My Trip. 

If you purchased Refundability at the time of initial booking, cancellations will not incur a cancellation fee. Visit Flyfrontier.com and retain the value of your purchase for use within 90 days of the transaction date. To request a refund, simply fill out our online refund request form. 

Note:  Tickets must be canceled 24hrs prior to flight departure in order to retain their value. Failure to show for any flight or cancel a ticket prior to any ticketed flight departure will result in the application of a service charge in an amount equal to the value attributable to the no-show portion of the itinerary.