Does southwest fly to dca ? Is there a Southwest flight to DCA, you ask? Yes, Southwest Airlines at DCA provides direct service to and from a number of significant American cities. Southwest offers travelers a convenient, effective, and reasonably priced travel experience out of Terminal 1 at Ronald Reagan Washington National Airport. Easy to find, Terminal 1 (previously Terminal A) provides fast access to security, gates, and check-in. If you're wondering which terminal at DCA airport is used by Southwest Airlines, it's Terminal 1, which is perfect for smooth travel. Southwest is a fantastic option for flights into the country's capital because of benefits like two complimentary checked baggage and no change fees.