By Plane
In Wyoming, Jackson, Casper, Cheyenne, Cody, Gillette, Laramie, Riverton, Rock Springs, and Sheridan have airports with commercial intrastate airline service. Presently, the airlines serving the state are Delta (tel. 800/221-1212; www.delta.com) and United (tel. 800/864-8331; www.united.com), with service to Jackson by American Airlines (tel. 800/433-7300; www.aa.com), Northwest (tel. 800/225-2525; www.nwa.com), and Big Sky Airlines (tel. 800/237-7788). Commuter carriers in Wyoming include SkyWest (tel. 800/453-9417; www.skywest.com) and Great Lakes Airlines (tel. 800/554-5111; www.greatlakesav.com).
Wyoming's airports are dwarfed by Denver International Airport in Colorado and Salt Lake City International Airport in Utah. However, connecting flights are available from Denver and Salt Lake to almost all of the regional airports in Wyoming, and -- if you have time -- renting a car in one of these larger cities can make for a nice scenic drive to your final destination.
Immigration & Customs Clearance -- Foreign visitors arriving by air, no matter what the port of entry, should cultivate patience and resignation before setting foot on U.S. soil. U.S. airports have considerably beefed up security clearances in the years since the terrorist attacks of 9/11, and clearing Customs and Immigration can take as long as 2 hours.
People traveling by air from Canada, Bermuda, and certain Caribbean countries can sometimes clear Customs and Immigration at the point of departure, which is much faster.