$209+ Cheap flights from Columbia, MO (COU) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/27. Fares are subject to change and may not be available on all flights or dates of travel.
Find cheap flights from Columbia to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Columbia to Illinois
Keep the following information in mind while searching for Columbia to Illinois flight deals. Data was last updated June 12, 2025.
Round-trip from | $259 (American Airlines) |
|---|---|
Popular in | September |
Cheapest in | October |
Average price | $289 |
Good round-trip deal | $447 or less |
Good one-way deal | $352 or less |
Find flight deals from Columbia to Illinois
Cheapest flights from Columbia to IllinoisExplore the most affordable flight options available from Columbia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
Explore the most affordable flight options available from Columbia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.
This United Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Cheapflights Fare Finder
Customize your flight search to find flights from Columbia to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Columbia to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
ColumbiaChicago
COU - ORD
COUORD
Columbia Regional
Fri 11/7
8:00 am-9:33 am
Nonstop1h 33m
Chicago O'Hare Intl
Fri 11/21
7:35 pm-9:10 pm
Nonstop1h 35m
ColumbiaChicago
COU - ORD
COUORD
Columbia Regional
Tue 8/19
6:15 am-7:48 am
Nonstop1h 33m
Chicago O'Hare Intl
Wed 10/8
8:11 pm-9:52 pm
Nonstop1h 41m
ColumbiaSt. Louis
COU - STL
COUSTL
Columbia Regional
Fri 8/8
7:17 pm-8:20 am
1 stop13h 03m
Lambert-St Louis
Sun 8/10
6:00 am-11:19 am
1 stop29h 19m
ColumbiaChicago
COU - ORD
COUORD
Columbia Regional
Sat 9/27
8:00 am-9:35 am
Nonstop1h 35m
ColumbiaChicago
COU - ORD
COUORD
Columbia Regional
Sat 9/27
4:23 pm-10:51 am
1 stop18h 28m
Best time to book a flight from Columbia to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Columbia with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Columbia to Illinois
What is the cheapest month to book a flight from Columbia, Missouri to Illinois?
Currently, August is the cheapest month in which you can book a flight from Columbia, Missouri to Illinois (average of $245). Flying from Columbia, Missouri to Illinois in March is currently the most expensive (average of $321). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from COU to IL?
Find hourly flight availability from Columbia to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Columbia, Missouri to Illinois as you normally would.
Weekly flight availability from Columbia, Missouri to Illinois
Explore weekly flight availability from Columbia to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated June 12, 2025.
The most flights from COU to USIL are scheduled on a Monday (4 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (1 on average).
Rainfall in Illinois by month
Plan your trip to Illinois by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.
Temperature in Illinois by month
Plan your trip to Illinois by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Illinois, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).
Reviews of airlines servicing Illinois
Get insights into the airlines that provide service to Illinois. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Illinois. Reviews last updated June 12, 2025.
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Andrew,May 2025
LAX - MIA
Food
Boarding
Crew
Entertainment
Comfort
Overall
Reviews
Andrew,May 2025
LAX - MIA
Related info for your journey
Find useful and relevant information for your journey from Columbia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Columbia to Illinois
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Columbia to Illinois
Discover the top airline that operate flights from Columbia to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$234 | Average$370 | FlexibilityNo cancel fee | On-time71% |