Southwest allows flight changes per one-way flight. Fare differences may also apply when changing to a more expensive flight. Changes must be made at least 10 minutes before the originally scheduled departure time to avoid ticket forfeiture. If you have questions or need assistance related to Southwest Change Flight, fare class rules, and change procedures, passengers can refer to the Airlines pet Policy. Additionally contact customer service at 800-435-9792 or +1-844-902-4930 (OTA Skip-Waiting). Knowing the conditions helps minimize costs when travel plans adjust.