Southwest Airlines flies out of Ronald Reagan Washington National Airport's Terminal 1 and has Southwest Airlines Ronald Reagan Washington National Airport multiple domestic flights out of DCA. Committed to friendly customer policies, Southwest Airlines allows free checked bags, which makes traveling from DCA a hassle-free, confusing experience. Southwest operates on a point-to-point route network, as described in the background of this company. Self-service kiosks, mobile check-in capabilities, and Rapid Rewards are all very convenient for the passenger. With its promise of reliability and affordability, Southwest is still a sure bet for many travelling in and out of the nations' capital.