If a traveller buys a ticket from Frontier at least seven days (168 hours) before the flight's scheduled departure, they are entitled to a free ticket change within 24 hours of purchase.
Frontier Airlines keeps the passenger's ticket for a period of 24 hours before charging any fees. Your credit card statement will also reflect the transaction after 24 hours of the ticket purchase.
Frontier Airlines does not provide free change services for tickets purchased with fewer than seven days (168 hours) before the scheduled departure date.
Only that travel agency's 24-hour change policy will be applied to tickets purchased through select third-party travel agencies.
Read also : Southwest Airlines 24-hour change policy | Jetblue Airlines24-hour change policy