Lake Koshkonong airports ::
The nearest airport is MSN - Madison Dane Co Rgnl Truax Fld, located 42.6 km north west of Lake Koshkonong.
Other airports nearby include MKE - Milwaukee General Mitchell Intl (83.6 km east), ORD - Chicago Ohare Intl (132.9 km south east), MDW - Chicago Midway Intl (157.6 km south east), GRB - Green Bay Austin Straubel Intl (186.3 km north),