Van Vleck Hall (Mathematics Department)
480 Lincoln Dr, Madison, WI 53706
Flight:
Option 1: Fly to Madison (Dane County Regional Airport)
Option 2: Fly to Chicago O'Hare airport, then, take the "Van Galder bus" from O'Hare to Madison Campus which takes about 3 to 3.5 hours. (bus schedule can be found at https://www.coachusa.com)
personally I found the 3-hour bus not very comfortable...
Bus: https://www.cityofmadison.com/metro/fares
Uber / Lyft / Taxi are also available.