By ship
Lake Express
Car ferry between Milwaukee, Wisconsin, and Muskegon, Michigan. Two and a half hour trip.
By plane
Unless flying to Milwaukee or Madison, it is often easier to enter Wisconsin by making a connection in another state. Midwest Airlines/Frontier Airlines (http://www.midwestairline...), with a hub in Milwaukee, serves most Wisconsin cities and is known for its excellent service but has limited service nationally. The most comprehensive service from a hub/hubs to Wisconsin is provided by Delta Air Lines (http://www.delta.com) through Minneapolis, Detroit, Memphis, Cincinnati, and Atlanta. United (http://www.united.com) also provides frequent service to the southern two thirds of the state via Chicago O'Hare. American (http://www.aa.com) has a substantial number of flights from Chicago O'Hare as well. Other carriers providing less frequent service include Continental Express Cleveland and Newark, US Airways, AirTran, and Southwest.
Milwaukee handles a very limited number of flights from Toronto and some Mexican destinations. Travelers originating internationally will find the greatest number of flight options if they opt to make connections through Chicago O'Hare. Connections from international services are also available through Minneapolis and Detroit as well as Cincinnati.
By Rail
Amtrak
(http://www.amtrak.com) connects Chicago to Milwaukee via the Hiawatha service. The Empire Builder line, strectching from Chicago to Seattle/Portland, travels through Wisconsin, making five stops in the state Milwaukee, Columbus, Portage, Wisconsin Dells, Tomah, and La Crosse.The Chicagoland Metra (http://www.metrarail.com) also has a line that stretches up all the way to Kenosha.