Cheap flights from Detroit to Illinois from $63

The cheapest month to fly to Illinois from Detroit is in September. Flight prices, which tend to average around $45, 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 September, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $48.

The cheapest day to depart from Detroit to Illinois is on a Friday when prices can be found for as low as $518. Flights from Detroit to Illinois on a Tuesday will generally be more expensive and average around $700. 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 Detroit to Illinois during this time can be as low as $518. Flights at noon are often more expensive with an average ticket price of $892.

Fly from Detroit Metropolitan Wayne County to Chicago O'Hare Intl for the best Detroit - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Detroit when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $289 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Detroit for as low as $111 on momondo.

There are 4 cabin classes available to choose from on Detroit 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 Detroit to Illinois

Delta, United Airlines and American Airlines are the top three most popular airlines that fly to Illinois from Detroit according to our data. Delta is the first choice among our users, with 50% 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 May 2026, 105 flights take off from Detroit and land in Illinois each day. The most common flight departure time for this route is 1:00PM, with 42% of daily flights taking off in the afternoon.

The number of flights available between Detroit and Illinois is 738 per week as of May 2026. The most frequent departure day is Fri, with 17% of weekly flights leaving on this day.