Cheap flights from Greenville to Illinois from $122

The cheapest month to fly to Illinois from Greenville is in March. Flight prices, which tend to average around $286, 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 March, then flying in April is also cheap. Prices for this month can be found on momondo for an average of $304.

The cheapest day to depart from Greenville to Illinois is on a Thursday when prices can be found for as low as $428. Flights from Greenville to Illinois on a Sunday will generally be more expensive and average around $707. 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 Greenville to Illinois during this time can be as low as $335. Flights at noon are often more expensive with an average ticket price of $687.

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

You are more likely to see cheaper flights to Illinois from Greenville when booking weeks ahead of your departure date. In general, you can expect to find flights to Illinois for around $337 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Illinois from Greenville for as low as $156 on momondo.

There are 4 cabin classes available to choose from on Greenville 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, Delta, and Southwest are the most popular carriers operating from Greenville to Illinois

American Airlines, United Airlines and Frontier are the top three most popular airlines that fly to Illinois from Greenville according to our data. American 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 7 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 Greenville and Illinois is 23 per day as of November 2026. The most frequent departure time is 6:00AM, with 54% of daily flights leaving at noon.

As of November 2026, there are 163 flights per week flying from Greenville to Illinois. The most common day of the week flights depart is Tue, with 17% of flights taking off on this day.