Operating out of United Airlines TUL Terminal United Airlines mostly uses Concourse A. Featuring free Wi-Fi, culinary options, and cozy seating, the terminal provides a seamless travel experience. Check-in, security clearance, and gate access for regional and connecting flights are all done quickly and easily for United travelers. The small layout of TUL guarantees easy navigation for a stress-free trip. Visit Us: https://www.worldsairportsterminals.com/united-airlines/united-airlines-tulsa-international-airport-tul-terminal/