Tucson International Airport (520/573-8000, www.tucsonairport.org) is 8.5 miles south of downtown. About 10 airlines touch down here with nonstop service to at least 10 cities in the United States, as well as to Hermosillo in Mexico. Information counters at both ends of the airport have brochures. Sun Tran (bus #6, 11, and 25), airport shuttles, and taxis connect the airport with downtown. Arizona Stagecoach (520/889-1000, www.azstagecoach.com) provides 24-hour shuttle service between the airport and your destination in the Tucson and Green Valley areas; call 24 hours in advance.
Arizona Shuttle Service (5350 E. Speedway Blvd., 520/795-6771, www.arizonashuttle.com) connects Tucson with Sky Harbor Airport in Phoenix.
Greyhound (2 S. 4th Ave. at E. Broadway, 800/231-2222 fares and schedules or 520/792-3475 local terminal, www.greyhound.com) offers daily service to many cities from its terminal downtown; it's open 24 hours and has lockers and a coffee shop.
Arizona Shuttle (tel 520/795-6771 or 800/888-2749 Tucson services; 928/226-8060 or 877/226-8060 other services, www.arizonashuttle.com) connects the Grand Canyon, Williams, Flagstaff, Sedona, Camp Verde, Phoenix, and Tucson.
Crucero (520/792-3475) connects the Greyhound terminal with Nogales; some buses continue past Nogales into Mexico.
Amtrak (400 E. Toole Ave. downtown, 800/872-7245, www.amtrak.com) schedules three eastbound and two westbound departures every week on the Sunset Limited/Texas Eagle. The train connects Los Angeles with Chicago (Texas Eagle) and Orlando (Sunset Limited), splitting or joining in Texas.
Sun Tran (520/792-9222, www.suntran.com) takes you to the parks, sights, and shopping areas of the city and to the airport for only $1, exact change only. Transfers are free; ask the driver before you pay your fare. Drivers also sell a $2 day pass. Buses congregate downtown at the Ronstadt Transit Center on the corner of Congress Street and Sixth Avenue; the Transit Center, Visitors Bureau, and website have free schedules.
Old Pueblo Trolley (520/792-1802, www.oldpueblotrolley.org) runs historic trolleys along 4th Avenue and University Boulevard on Friday evening, Saturday afternoon and evening, and Sunday afternoon.
Gray Line Tours Tucson (3594 E. Lincoln St. Tucson, AZ 85714, 520/622-8811 or 800/276-1528, www.graylinearizona.com) offers day-trips of the city (Barrio Historico, Old Town Artisans, and San Xavier, 3.5 hours), Arizona-Sonora Desert Museum/San Xavier (four hours), Old Tucson (4 hours), Tombstone (8 hours), Bisbee (eight hours), and the Grand Canyon (3 days).
Trail Dust Adventures Jeep Tours (520/747-0323, www.traildustadventures.com) shows you scenery and petroglyphs on a private jeep trail near Tucson.
Mt. Lemmon SkyCenter (520/626-8122, http://skycenter.arizona.edu) offers SkyNights programs that show you the heavens from an observatory with a 24-inch telescope atop Mt. Lemmon; see the website for details on this and other science programs.
For hot-air balloon flights in the Tucson area, call Fleur de Tucson Balloon Tours (520/529-1025, www.fleurdetucson.net), Balloon America (520/299-7744, www.balloonrideusa.com), or Thunderbird Adventures (520/544-4500 or (877/605-4500, www.balloonrideus.com/bookingforms/thunderbirdBR.htm).
On to Tucson to Mexico