United Airlines operates from multiple terminals at O'Hare International Airport (ORD) in Chicago, with significant operations in Terminal 1, Terminal 2, and Terminal 5. These terminals collectively provide a comprehensive travel experience for passengers departing from or arriving on United Terminal ORD flights.

Terminal 1, often referred to as the United Terminal, serves as a major hub for United Airlines. It is a modern facility that handles both domestic and international flights. Inside Terminal 1, passengers can find United's check-in counters, security checkpoints, and various amenities, including dining options, retail stores, and United Club lounges. The terminal's design is geared towards facilitating a smooth and efficient travel experience.

Terminal 2 at O'Hare handles various domestic flights, including those operated by United Airlines. This terminal features services such as check-in facilities, security checkpoints, and amenities to ensure a comfortable journey for passengers travelling domestically.

For international flights, particularly those operated by United, Terminal 5 is the dedicated international terminal at O'Hare. This terminal provides customs and immigration services, in addition to check-in and security facilities. Passengers departing on United's international flights from Terminal 5 can access a range of amenities, including duty-free shops and dining options.

United Club lounges are available in different terminals, offering a more exclusive and comfortable environment for eligible passengers. These lounges provide amenities such as complimentary snacks, beverages, Wi-Fi, and business services, enhancing the overall travel experience.

It's essential for passengers to check their flight itineraries or contact United Airlines directly to confirm the specific terminal for departure or arrival, as terminal assignments can be subject to change. Keeping up-to-date with the latest information ensures a seamless journey through O'Hare International Airport.

In summary, United Airlines' operations at O'Hare International Airport encompass Terminals 1, 2, and 5, catering to both domestic and international flights. The terminals feature a range of services and amenities, reflecting United's commitment to providing a comfortable and efficient travel experience for passengers at one of the busiest airports in the world. Travelers are encouraged to verify terminal assignments and check for updates closer to their travel date for the most accurate information.