Spirit Airlines operates out of Terminal 3 at Chicago O'Hare International Airport, offering travelers a convenient and efficient gateway for both domestic and select international flights. When flying with Spirit Airlines at Chicago O'Hare, passengers will enter through Terminal 3, which is known for its modern amenities, multiple dining options, and streamlined security checkpoints. As one of the busiest terminals at O'Hare, Terminal 3 serves as a hub for several carriers, including Spirit, providing access to numerous gates and efficient transit connections.