United

United Airlines is a major U.S. airline operating through united.com and its mobile app, providing flight booking, check-in, and travel management services. It serves leisure and business travelers seeking domestic and international air transportation across a global route network anchored by hubs in cities like Chicago, Denver, Houston, and Newark. The platform allows customers to search and purchase tickets, select seats, manage MileagePlus loyalty accounts, and track flight status in real time. Business travelers and frequent flyers use the service to access premium cabins, earn and redeem miles, and manage travel itineraries including connections and upgrades. The app and website also support ancillary services such as baggage tracking, day-of-travel notifications, and rebooking during schedule disruptions.