Southwest Airlines Flight Cancellation Policy - Despite serving the aviation industry for more than 45 years, Southwest Airlines continues to put up exceptional effort, setting it apart from other airlines. Southwest Airlines became the largest domestic air carrier in the United States in 2003 and continues to hold that position today as a result of its straightforward and customer-friendly cancellation procedures, according to the U.S. Department of Transportation. Southwest flights, which offer the best travel experience, wow their consumers with reasonable ticket prices and a simple cancellation policy. With Southwest flights, everything is simple, from making reservations to changing or cancelling a journey. We will discuss Southwest Airlines' cancellation policy in depth in this post.