Chicago O’Hare International Airport (ORD), one of the busiest airports in the world, is home to United Airlines’ main operating base, Terminal 1. United Airlines ORD Terminal has a significant hub at O’Hare, where it operates both domestic and international routes. With several concourses, contemporary amenities, and services aimed at facilitating a smooth travel experience, Terminal 1 is well-equipped. This handbook offers a comprehensive rundown of all things United Airlines at ORD does, including terminal buildings, concourses, check-in procedures, security, lounges, and frequently asked questions (FAQs).