Cheap flights from Chattanooga to Illinois from $109

The cheapest month to fly to Illinois from Chattanooga is in February. Flight prices, which tend to average around $221, 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 February, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $255.

The cheapest day to depart from Chattanooga to Illinois is on a Friday when prices can be found for as low as $344. Flights from Chattanooga to Illinois on a Monday will generally be more expensive and average around $562. 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 in the afternoon. Flights from Chattanooga to Illinois during this time can be as low as $374. Flights at noon are often more expensive with an average ticket price of $442.

Fly from Chattanooga Lovell Field to Chicago O'Hare Intl for the best Chattanooga Lovell Field - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Chattanooga when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $292 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Chattanooga for as low as $261 on momondo.

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

Allegiant Air, American Airlines, and Delta are the most popular carriers operating from Chattanooga Lovell Field to Illinois

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Illinois from Chattanooga according to our data. United Airlines is the first choice among our users, with 46% 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.

As of September 2026, there are 2 flights per day flying from Chattanooga to Illinois. The most common time of day flights depart is 7:00AM, with 55% of flights taking off at noon.

16 flights are operational weekly from Chattanooga to Illinois as of September 2026. The most popular departure day for this route is Mon, with 44% of flights per week taking off on this day.