Cheap flights from Louisiana to Illinois from $125

The cheapest month to fly to Illinois from Louisiana is in January. Flight prices, which tend to average around $255, 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 $260.

The cheapest day to depart from Louisiana to Illinois is on a Friday when prices can be found for as low as $396. Flights from Louisiana to Illinois on a Sunday will generally be more expensive and average around $604. 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 Louisiana to Illinois during this time can be as low as $310. Flights at noon are often more expensive with an average ticket price of $530.

Fly from New Orleans Louis Armstrong to Chicago Midway for the best Louisiana - Illinois flight prices

You are more likely to see cheaper flights to Illinois from Louisiana when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $311 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Louisiana for as low as $230 on momondo.

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

United Airlines, Southwest, and Delta are the most popular carriers operating from Louisiana to Illinois

United Airlines, American Airlines and Southwest are the top three most popular airlines that fly to Illinois from Louisiana according to our data. United Airlines is the first choice among our users, with 40% 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 Louisiana and Illinois is 30 per day as of September 2026. The most frequent departure time is 11:00AM, with 72% of daily flights leaving at noon.

211 flights are operational weekly from Louisiana to Illinois as of September 2026. The most popular departure day for this route is Fri, with 18% of flights per week taking off on this day.