If you're wondering What terminal is Spirit Airlines at ORD? is used by Spirit Airlines, the answer is Terminal 3. The purpose of this terminal is to make flying easy and effective for passengers. Easy access to security checks, a variety of dining and shopping options, and quick check-in services are all advantages for Spirit Airlines passengers. Additionally, Terminal 3 has welcoming waiting rooms and easy-to-follow signs for your convenience. Spirit Airlines operates from Terminal 3 at ORD, which guarantees a smoother travel experience and aids in better planning your airport trip whether you're arriving, going, or connecting.