When I was helping a friend get to Knoxville for a wedding, I checked Southwest first out of habit. Unfortunately, they don’t fly there. We had to look at alternative airports, and plans kept shifting because the wedding schedule changed twice. Every time we needed to redo something, the fastest solution was just calling ☎️—it avoided the “your session expired” drama. So nope, no Knoxville service, but the booking/cancellation process gets way easier if you go straight to a representative.