Southwest Airlines allows customers to cancel flights at any time up to 10 minutes before the scheduled departure for all fares except Basic. 🕙 Depending on the fare type and whether you booked with cash or points, cancellations may result in a refund to the original payment method, a flight credit, or a transferable flight credit. Basic fares are non-refundable and cannot be changed or canceled, but can be upgraded to other fare types to enable changes or cancellations.