Situated in the Willis Tower, Chicago, United Airlines began functioning in 1926 as Varney Air Lines. With its extensive network spread across 48 countries, it covers multiple domestic and international routes. The airline has a total of 8 hubs. To manage its operations in 340+ destinations and ease travel for its passengers, it has an airport as well as city offices. The recent details of these offices can be explored with AirlinesOfficeGuide.