United Airlines Hubs: A Look At The Airline’s 5 Most Important Cities

One of the world’s largest airlines operates from eight main hub airports, serving tens of thousands of flights each year. It is the world’s largest airline by number of destinations served and third largest based on annual revenue. While United Airlines lists eight airports as its main hubs, including Guams Antonio B. Won Pat International Airport (GUM), Los Angeles International Airport (LAX), and Washington Dulles International Airport (IAD), there are five other airports where the airline offers more flights, seats, and capacity, measures in Available Seat Kilometers (ASK).