The best pricing can be found in the month of July. Prices to Illinois from Bellingham average $422. You can even find prices in July for less than $422, as users have found deals to Illinois from as low as $271. The month of September appears to be one of the more expensive times to travel to Illinois from Bellingham. Flying in the targeted month can save you up to 54%.
When flying from Bellingham to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.