Well, Altering Frontier Airlines flight within 24 hours of making a reservation is a cost-free procedure. However, in other instances, you will need to spend a certain sum of money in order to use the service. Let's look at it:

Changing the flight 60 days or more before takeoff costs nothing.
59 to 7 days or less before departure: US$49
US$79 up to 6 days or less before departure

Travelers should speak with officials or check the official website for the most recent charge adjustments.

Read also : Altering Southwest Airlines Flight | Altering Jetblue Airlines Flight