United Airlines is one of the largest full-service carrier with a vast network of domestic and international routes operating out of its major hubs at Chicago-O’Hare (ORD), Newark (EWR), Denver (DEN), Houston-Intercontinental (IAH), and Washington-Dulles (IAD) among others. United’s network has been designed to serve high-frequency business segments and long-haul international routes, aided by a … Continue reading Top 100 Busiest Routes of United Airlines in 2025