When flying from Sioux City 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.
The best pricing can be found in the month of December. Prices to Illinois from Sioux City average $329. You can even find prices in December for less than $329, as users have found deals to Illinois from as low as $250. The month of July appears to be one of the more expensive times to travel to Illinois from Sioux City. Flying in the targeted month can save you up to 41%.
When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 40 days in advance, which can save you up to 120% on flights from Sioux City to Illinois compared to booking the week you need them. Waiting 40 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $465. For sooner than that we have options available in the next 3 days from $713.