https://www.devex.com/people/ask-faq-s-do-you-get-travel-money-if-you-cancel-frontier-cashback-2434712
Within 24 hours If you cancel a refundable ticket within 24 hours of booking and the flight is at least seven days away, calling Frontier customer service at +1-888-925-4077 ,you'll receive a full refund. Non-refundable If you cancel a non-refundable ticket, you may not get a refund
Do you get travel money if you cancel Frontier