Cheap flights from Illinois to Charleston from $94

The cheapest month to fly to Charleston from Illinois is in September. Flight prices, which tend to average around $336, are often lower during this time because this is during the off-season. The month of December is another great option to travel to Charleston, with average flight prices from Illinois averaging around $369.

The cheapest day to depart from Illinois to Charleston is on a Wednesday. Travelers who choose to depart for Charleston on a Wednesday will often find tickets for as low as $348. The most expensive day to fly to Charleston is Sunday, with ticket prices averaging around $408.

The cheapest time of day to fly to Charleston is in the evening when flights can be purchased for as low as $373. In the afternoon is when there is more demand to fly to Charleston, so prices are often more expensive at around $390 per ticket.

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

You are more likely to see cheaper flights to Charleston from Illinois when booking weeks ahead of your departure date. In general, you can expect to find flights to Charleston for around $387 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Charleston from Illinois for as low as $340 on momondo.

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

Delta, Southwest, and American Airlines are the most popular carriers operating from Illinois to Charleston

United Airlines, American Airlines and Delta are the top three most popular airlines that fly to Charleston from Illinois according to our data. United Airlines is the first choice among our users, with 47% of people opting to fly with this airline when traveling to Charleston. Keep in mind that there are 5 different airlines that fly to Charleston on a routine basis, so you have a few additional options to choose from.

As of September 2026, there are 11 flights per day flying from Illinois to Charleston. The most common time of day flights depart is 10:00AM, with 53% of flights taking off at noon.

As of September 2026, there are 82 flights per week flying from Illinois to Charleston. The most common day of the week flights depart is Sat, with 22% of flights taking off on this day.