Southwest Airlines will charge you a Cancellation fee if you change your flight plans after the 24-hour grace period has passed. The cost varies according to the route, fare type, and moment the cancellation occurs. The following is a list of costs you would incur if you had to cancel the flight:

• Wanna Get Away tickets have a $200 per traveller cancellation fee.
• Anytime tickets have a $150 per passenger cancellation fee.
• Business Select tickets have a 125 USD per passenger cancellation fee.
• For Wanna Get Away fares, No Show is not allowed. The cost of Anytime tickets is USD 150 plus USD 50 for each person. Additionally, in the event of a no-show, the passenger for Business Select must pay USD 125 plus USD 75 per person.

Check more : Jetblue cancellation fee