Sudden changes in plans can become big stress for you and keeping this in mind, Southwest Airlines has come out with a flight change policy. If you are taking tension about Southwest Airlines Change Fee then don't you worry. Every airline charges some flight fee or Southwest Airlines also charges service fee but that fee will be in your budget. Southwest Airline Charges less fee and understands the condition of pessengers. The airlines do not charge any fee when you are making sudden changes in plans.

https://airlinespolicy.com/flight-change-policy/southwest-flight-change-policy/