Phoenix Sky Harbor International Airport(PHX) is one of the busiest airports in the US, processing more than 52 million passengers per year. It also serves as a major hub for Southwest Airlines and American Airlines, which dominate the airport with a market share of 36% and 31%, respectively. However, did you know that the Phoenix metropolitan area also has another airport? One that is much smaller and arguably more convenient for many journeys – Mesa Gateway Airport (IWA).