The nearest airport is in General Mitchell Intl. Airport (MKE), located 16.5 mi (26.5 km) from the city center. If you can't find a flight that's convenient for your trip, you might consider flying into Kenosha, WI (ENW-Kenosha Regional), which is 8.3 mi (13.4 km) away.
If you'd prefer to travel by train, the main station serving the city is Sturtevant Station.