To save on the cost of your flight from Illinois to Boise, book at least 24 days before your planned departure. Booking around this time can save you about 58% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $140 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $210.
The best pricing can be found in the month of August. Prices to Boise from Illinois average $146. You can even find prices in August for less than $146, as users have found deals to Boise from as low as $80. The month of November appears to be one of the more expensive times to travel to Boise from Illinois. Flying in the targeted month can save you up to 73%.
||$164||$252||No cancel fee||75%|
||$132||$423||No cancel fee||N/A|
||$275||$489||No cancel fee||71%|
||$278||$495||No cancel fee||69%|