Cheap flights from North America to Illinois from $89

The cheapest month to fly to Illinois from North America is in January. Flight prices, which tend to average around $263, 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 January, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $273.

The cheapest day to depart from North America to Illinois is on a Wednesday when prices can be found for as low as $402. Flights from North America to Illinois on a Sunday will generally be more expensive and average around $494. 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 North America to Illinois during this time can be as low as $347. Flights at noon are often more expensive with an average ticket price of $512.

Fly from Newark to Chicago Midway for the best North America - Illinois flight prices

You are more likely to see cheaper flights to Illinois from North America when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $243 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from North America for as low as $174 on momondo.

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

Frontier, Delta, and JetBlue are the most popular carriers operating from North America to Illinois

United Airlines, American Airlines and Frontier are the top three most popular airlines that fly to Illinois from North America according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Illinois. Keep in mind that there are 10 different airlines that fly to Illinois on a routine basis, so you have a few additional options to choose from.

As of July 2026, there are 564 flights per day flying from North America to Illinois. The most common time of day flights depart is 8:00AM, with 40% of flights taking off at noon.

3,952 flights are operational weekly from North America to Illinois as of July 2026. The most popular departure day for this route is Thu, with 18% of flights per week taking off on this day.