https://airfaresupport.com/blo....g/how-do-i-upgrade-o
If you want to upgrade your trip, but are already done with the bookings, no need to worry about it. Here are the steps to help you in guiding for How do I upgrade on Southwest Airlines. Follow the steps mentioned and get your flight ticket enhanced. You can also give a call to the assistant OTA: +1-800-970-3794 (A call to a USA agent) to have a direct way of resolving your concern about an upgrade.