Sunwing flight change fee
Before paying any charges you have to read some important points for the Sunwing flight change fee - Pessengers have to pay a Sunwing flight change fee of 100USD if the flight change request is made 21 or more days before the scheduled departure. In the case of a vacation package, the airline will change only flight bookings and no hotel change will be applicable.
https://airlinespolicy.com/flight-change-policy/sunwing-flight-change-policy/