If you want to change or cancel a booked flight ticket, you must be proactive and go through the Southwest Airlines check-in process as soon as possible. This will assist you get your travel changed or cancelled as soon as possible. It would be advantageous if you felt like getting the policy in order to cancel a flight and also wanted a full refund. To expect the cancellation procedure and reimbursement at a specific time, you must be confident that you have purchased a refundable ticket or are in compliance with Southwest Airlines' cancellation policy at this moment. According to Southwest Airlines rules, you have 24 hours to cancel a flight and must speak with a professional who will help you do it at the appropriate time.