Dane County Regional Airport (MSN) serves Madison with more than 95 daily arrivals and departures. A taxi from the airport to the downtown/campus area is a 15-20 minute ride and will cost around $25.
Milwaukee General Mitchell International Airport (MKE). Travel times depend on traffic:
1.5 hrs away by car
2 hrs by Badger Bus service between the Milwaukee airport and campus ($23/one way, a few trips daily)
Chicago O’Hare (ORD). Travel times depend on traffic:
2.5 hrs by car
3 hrs by Van Galder Bus service ($31/one-way between O’Hare airport and campus, 13 trips daily)
There is also Van Galder Bus Service to Chicago Midway/Amtrak Station.