United Airlines - Wikipedia During World War II, United modified the aircraft for military use and transporting supplies After the war, United capitalized on the aviation boom, and in 1961 merged with Capital Airlines, briefly becoming the world's second-largest airline
United Airlines - Flight Check In Check in for your United or United Express-operated flight, depending on where you are in your travel experience
Help Center - United Airlines United Club and lounges See how to check in for flights, watch your flight's status, register for TSA PreCheck and more Hourslink opens in new window See when United Club locations are lounges are open Accesslink opens in new window How you can get into a United Club location or enjoy the lounge