Cheap flights from Atlanta to Illinois from $17

The cheapest month to fly to Illinois from Atlanta is in February. Flight prices, which tend to average around $160, 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 $167.

The cheapest day to depart from Atlanta to Illinois is on a Wednesday when prices can be found for as low as $255. Flights from Atlanta to Illinois on a Monday will generally be more expensive and average around $406. 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 Atlanta to Illinois during this time can be as low as $215. Flights at noon are often more expensive with an average ticket price of $341.

Fly from Atlanta Hartsfield-Jackson to Chicago Midway for the best Atlanta Hartsfield-Jackson - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Atlanta when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $223 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Atlanta for as low as $194 on momondo.

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

Delta, Southwest, and United Airlines are the most popular carriers operating from Atlanta Hartsfield-Jackson to Illinois

Frontier, Delta and United Airlines are the top three most popular airlines that fly to Illinois from Atlanta according to our data. Frontier is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 5 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 Atlanta and Illinois is 149 per day as of August 2026. The most frequent departure time is 3:00PM, with 46% of daily flights leaving in the afternoon.

As of August 2026, 1,048 flights take off from Atlanta and land in Illinois each week. The most common flight departure day for this route is Mon, with 20% of weekly flights taking off on this day.