Hi there! If you're wondering what terminal Southwest is at DCA, it's Southwest Airlines DCA Terminal, and I had a really smooth experience there. I flew to Atlanta last month and was relieved at how easy it was to find the Southwest check-in area right near the entrance. Security was fast, and even though the terminal is smaller than others, it felt cozy and well-organized. I grabbed a coffee at a nearby café before boarding. The Southwest staff were friendly, and everything ran on time. It’s not the fanciest terminal, but it definitely gets the job done efficiently and pleasantly! visit us https://www.airofficecounter.com/southwest-airlines-airport/southwest-airlines-ronald-reagan-washington-national-airport-terminal-dca/