Southwest Airline with their most appropriate and efficient flight value ticket modification policy can offer you a refund on mechanically modifying your flight at no charge to you. Flight changes to your reservations and travel plans are hard finished. The round-the-clock Southwest flight change policy allows passengers to change their flight up to ten minutes prior to the flight's departure. You are allowed to modify your flight within twenty four hours of booking without any flight change charges. Southwest Airlines' policy gives you the opportunity to change it slowly and up to date at no extra charge.