Log on to Southwest.com and hover your mouse over the "Air" icon. A mini-menu will come up. Click on "Cancel Your Reservation".
Enter your reservation information. This is your confirmation number, and your first and last name. The confirmation number can be retrieved from the email that was sent when you booked the flight. If you booked a flight through Southwest Vacations or a Southwest Group ticket, you must call Southwest at 1-800-I-FLY-SWA to cancel.
Write down the confirmation number given. If you booked a Business Select or Anytime fare, you will be eligible to receive a 100 percent refund to the credit card you booked the flight on, or you may use the funds toward your next flight. If you booked a "Wanna Get Away" fare, you are not eligible for a refund, but funds may be used for a future flight. Anyone wishing to use travel funds toward a future flight has 12 months to use the funds.