To avoid any unpleasant situations,I'd recommend checking the websites of the San Antonio International Airport and Southwest Airlines. Besides, you can ask your travel agent about the latest information on COVID-19 protocols. My guys from
business class flights always keep me informed. Additionally, it's important to check the local regulations and guidelines of the place you're traveling to. They may have their own specific requirements related to face masks and COVID-19. I hope my advice will be helpful!