Tucson International Airport provides service from all major points across the U.S.
The website is http://www.tucsonairport.org/html/tia_airlinelinks.html
Ground transportation from the Tucson Airport to the JW Marriott Starr Pass is best accomplished by taking any airport taxi, for about $35-$40.
There is no dedicated specific Resort Shuttle at this time.
If you are driving to the resort, there is a Freeway Exit Sign for the exit to "Starr Pass Blvd" just South of the center of Tucson.
Take the "Starr Pass Blvd" exit West. Drive about 4 miles until the road winds slightly to the Northwest, just past Greasewood (great name). The road ends at the resort. Can't miss it.
(If you get lost, send smoke signals, and we'll send the cavalry out for you.)