Cheap flights from Cincinnati to Illinois from $68

The cheapest month to fly to Illinois from Cincinnati is in April. Flight prices, which tend to average around $272, 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 April, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $298.

The cheapest day to depart from Cincinnati to Illinois is on a Friday when prices can be found for as low as $511. Flights from Cincinnati to Illinois on a Sunday will generally be more expensive and average around $714. 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 morning. Flights from Cincinnati to Illinois during this time can be as low as $501. Flights in the afternoon are often more expensive with an average ticket price of $1,013.

Fly from Cincinnati Cinci./N. Kentucky to Chicago Midway for the best Cincinnati Cinci./N. Kentucky - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Cincinnati when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $381 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Cincinnati for as low as $222 on momondo.

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

Frontier and Southwest are the most popular carriers operating from Cincinnati Cinci./N. Kentucky to Illinois

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Cincinnati according to our data. United Airlines is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 3 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

53 flights are operational daily from Cincinnati to Illinois as of October 2026. The most popular departure time for this route is 2:00PM, with 45% of flights per day taking off at noon.

As of October 2026, there are 373 flights per week flying from Cincinnati to Illinois. The most common day of the week flights depart is Wed, with 18% of flights taking off on this day.