Phoenix Airport Trains Unveiled CheapOair Staff August 17, 2011 general Travel Gets Easier for Travelers Phoenix Sky Harbor International Airport showcased its first PHX Sky Train car Wednesday. The purpose of the trains will be to transport travelers between the city’s METRO and the Phoenix airport parking and Terminal 4. They are expected to start running in the beginning of 2013 and cover all of Phoenix Sky Harbor’s terminals by 2015. Travelers with Phoenix flights can stress less on the commute now. 18 Sky Train cars were delivered this month. According to the Airport World report, more than six million people are expected to use the train. Planned hours for the train are 24/7. CC Flickr photo credit: judy_and_ed