Heyy!!! I am Chris Evans. Here's what we'll cover. Information on the existence of a physical United Airlines Office in Chicago is inconclusive. Some sources list official contact number of United Airlines. You can always reach customer service through United Airlines Chicago Office Phone Number. Are you planning a trip to the Chicago and considering flying with United Airlines? Then You need United Airlines Chicago Office Contact. United Airlines, the award-winning national carrier , offers a smooth and comfortable flying experience to destinations worldwide, including Chicago. Reach out to them and a customer service representative will get in touch with you.