To save up to 10% on this flight, we recommend booking at least 20 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Illinois to Wisconsin from $137 1-2 weeks out and tickets from $157 for flights departing within the next 72 hours.
The best pricing can be found in the month of April. Prices to Wisconsin from Illinois average $135. You can even find prices in April for less than $135, as users have found deals to Wisconsin from as low as $33. The month of December appears to be one of the more expensive times to travel to Wisconsin from Illinois. Flying in the targeted month can save you up to 49%.