Cheap flights from Dayton to Illinois from $133

The cheapest month to fly to Illinois from Dayton is in December. Flight prices, which tend to average around $233, 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 December, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $243.

The cheapest day to depart from Dayton to Illinois is on a Friday when prices can be found for as low as $443. Flights from Dayton to Illinois on a Monday will generally be more expensive and average around $691. 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 evening. Flights from Dayton to Illinois during this time can be as low as $470. Flights at noon are often more expensive with an average ticket price of $713.

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

You are more likely to see cheaper flights to Illinois from Dayton when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $327 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Dayton for as low as $168 on momondo.

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

American Airlines, Delta, and United Airlines are the most popular carriers operating from Dayton to Illinois

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Dayton according to our data. United Airlines is the first choice among our users, with 58% 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 October 2026, 12 flights take off from Dayton and land in Illinois each day. The most common flight departure time for this route is 12:00PM, with 50% of daily flights taking off in the afternoon.

86 flights are operational weekly from Dayton to Illinois as of October 2026. The most popular departure day for this route is Thu, with 33% of flights per week taking off on this day.