Cheap flights from Tucson to Illinois from $167

The cheapest month to fly to Illinois from Tucson is in September. Flight prices, which tend to average around $422, are often lower during this time because this is during the off-season. If you aren’t able to travel to Illinois during the month of September, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $426.

The cheapest day to depart from Tucson to Illinois is on a Thursday when prices can be found for as low as $490. Flights from Tucson to Illinois on a Monday will generally be more expensive and average around $726. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

Our most recent data shows that the best time of day to fly to Illinois is at noon. Flights from Tucson to Illinois during this time can be as low as $525. Flights in the morning are often more expensive with an average ticket price of $532.

Fly from Tucson to Chicago O'Hare Intl for the best Tucson - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Tucson when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $477 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Tucson for as low as $360 on momondo.

There are 4 cabin classes available to choose from on Tucson to Illinois flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Southwest, Delta, and American Airlines are the most popular carriers operating from Tucson to Illinois

American Airlines, Allegiant Air and United Airlines are the top three most popular airlines that fly to Illinois from Tucson according to our data. American Airlines is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 4 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

The number of flights available between Tucson and Illinois is 10 per day as of November 2026. The most frequent departure time is 8:00AM, with 63% of daily flights leaving at noon.

As of November 2026, 76 flights take off from Tucson and land in Illinois each week. The most common flight departure day for this route is Mon, with 16% of weekly flights taking off on this day.