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Illinois

$106+ Cheap flights from Colorado Springs (COS) 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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Colorado Springs to Illinois

Cheapest flights from Colorado Springs to Illinois
Explore the most affordable flight options available from Colorado Springs to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 12/316:23 pmCOS - ORD
1 stop4h 36mUnited Airlines
Sun 1/49:12 amORD - COS
Nonstop3h 12mUnited Airlines
Deal found 12/9$298
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/1812:11 pmCOS - MLI
1 stop8h 10mUnited Airlines
Thu 12/258:45 amMLI - COS
1 stop7h 12mUnited Airlines
Deal found 12/10$379
This American Airlines deal was found by Cheapflights users on 12/9. 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.
Wed 12/3112:25 pmCOS - ORD
Nonstop2h 44mAmerican Airlines
Sun 1/49:50 amORD - COS
Nonstop3h 02mAmerican Airlines
Deal found 12/9$382
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/1812:11 pmCOS - MLI
1 stop8h 10mUnited Airlines
Wed 12/241:00 pmMLI - COS
2 stops10h 06mUnited Airlines
Deal found 12/10$384
This Southwest deal was found by Cheapflights users on 12/11. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:00 amCOS - STL
1 stop4h 20mSouthwest
Sat 1/37:30 pmSTL - COS
1 stop6h 50mSouthwest
Deal found 12/11$422
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/179:24 amCOS - MLI
1 stop4h 57mUnited Airlines
Thu 12/258:45 amMLI - COS
1 stop7h 12mUnited Airlines
Deal found 12/10$427
This Southwest deal was found by Cheapflights users on 12/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:25 pmCOS - STL
1 stop5h 20mSouthwest
Sun 1/45:20 amSTL - COS
1 stop4h 45mSouthwest
Deal found 12/10$427
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/179:24 amCOS - MLI
1 stop4h 57mUnited Airlines
Wed 12/241:00 pmMLI - COS
2 stops10h 06mUnited Airlines
Deal found 12/10$432
This American Airlines deal was found by Cheapflights users on 12/9. 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.
Tue 12/234:46 pmCOS - ORD
1 stop5h 29mAmerican Airlines
Mon 12/2910:29 amORD - COS
1 stop6h 25mAmerican Airlines
Deal found 12/9$433
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Fri 12/123:33 pmCOS - ORD
2 stops19h 32mUnited Airlines
Sat 12/132:21 pmORD - COS
1 stop8h 29mUnited Airlines
Deal found 12/9$444
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/2512:11 pmCOS - ORD
Nonstop2h 52mUnited Airlines
Mon 12/297:50 pmORD - COS
Nonstop3h 00mUnited Airlines
Deal found 12/10$456
This American Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/1712:36 pmCOS - MLI
1 stop4h 55mAmerican Airlines
Wed 12/246:20 amMLI - COS
1 stop6h 27mAmerican Airlines
Deal found 12/10$457

Find flight deals from Colorado Springs to Illinois

Keep the following information in mind while searching for Colorado Springs to Illinois flight deals. Data was last updated December 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$243
(American Airlines)

One-way from

$106
(Kiwi.com)

Popular in

November

Cheapest in

January

Average price

$241

Good round-trip deal

$342 or less

Good one-way deal

$175 or less
Provider with most accurate pricing for Denver Intl-Chicago (CHI) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Chicago (CHI) flights.
Search Deals
From Colorado Springs to Illinois
Search Deals
One-way flight from Colorado Springs to Illinois
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Colorado Springs to Illinois.
Search Deals
Price to beat on a one-way flight from Colorado Springs to Illinois.
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado Springs 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 December 12, 2025.
Use the filters below to find and compare flights from Colorado Springs to Illinois that are best for you.

Fly from

Colorado Springs

Fly to

Illinois

Route

Depart

Return

Price

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Tue 1/6

1:25 pm-7:51 pm

1 stop5h 26m

Chicago O'Hare Intl

Sat 1/17

8:50 am-11:02 am

Nonstop3h 12m

$253

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 1/14

11:43 am-3:35 pm

Nonstop2h 52m

Chicago O'Hare Intl

Wed 1/21

8:50 am-11:02 am

Nonstop3h 12m

$261

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Sat 2/7

11:43 am-3:35 pm

Nonstop2h 52m

Chicago O'Hare Intl

Tue 2/10

8:50 am-11:02 am

Nonstop3h 12m

$261

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 1/7

11:33 am-7:51 pm

1 stop7h 18m

Chicago O'Hare Intl

Wed 1/14

8:50 am-11:02 am

Nonstop3h 12m

$271

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Fri 1/9

1:45 pm-7:05 pm

1 stop4h 20m

Lambert-St Louis

Thu 1/15

2:25 pm-10:00 pm

1 stop8h 35m

$273

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Thu 1/29

11:43 am-3:35 pm

Nonstop2h 52m

Chicago O'Hare Intl

Sat 1/31

8:50 am-11:02 am

Nonstop3h 12m

$276

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 1/28

12:00 pm-9:52 pm

1 stop8h 52m

Chicago O'Hare Intl

Wed 2/4

5:30 am-12:23 pm

1 stop7h 53m

$281

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 1/7

6:00 am-1:30 pm

1 stop6h 30m

Chicago O'Hare Intl

Wed 1/14

2:15 pm-7:20 pm

1 stop6h 05m

$281

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Tue 1/6

1:25 pm-6:46 pm

1 stop4h 21m

Chicago O'Hare Intl

Tue 1/13

3:59 pm-10:06 pm

1 stop7h 07m

$281

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 1/28

11:33 am-7:51 pm

1 stop7h 18m

Chicago O'Hare Intl

Wed 2/4

10:40 am-2:34 pm

1 stop4h 54m

$281

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/9

Showing 1-10 of 58 results
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Best time to book a flight from Colorado Springs to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from Colorado Springs with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Colorado Springs to Illinois

What is the cheapest month to book a flight from Colorado Springs to Illinois?

Currently, July is the cheapest month in which you can book a flight from Colorado Springs to Illinois (average of $46). Flying from Colorado Springs to Illinois in June is currently the most expensive (average of $109). 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 COS to IL?

Find hourly flight availability from Colorado Springs 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 December 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado Springs to Illinois as you normally would.

Weekly flight availability from Colorado Springs to Illinois

Explore weekly flight availability from Colorado Springs 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 December 12, 2025.

The most flights from COS to USIL are scheduled on a Monday (6 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (4 on average).

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 December 12, 2025.
Read reviews from past customers who have flown Southwest, United Airlines, and American Airlines from Colorado Springs to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
Southwest
7.9
Good
4,253 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
United Airlines
7.4
Good
9,095 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am
American Airlines
7.2
Good
11,050 reviews
Southwest
7.9
Good
4,253 reviews

Entertainment

7.5

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

7.9

Reviews

1 / 20
2.0
Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

Find useful and relevant information for your journey from Colorado Springs to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Colorado Springs to Illinois?

    If you book a flight to Illinois from Colorado Springs, you will be flying from Colorado Springs, which is the city’s only airport. Colorado Springs (COS) is located 6.7 mi from the center of Colorado Springs.

  • How long is the flight from Colorado Springs to Illinois?

    United Airlines, Southwest, and Delta can get you from Colorado Springs to Illinois in just under 4h 20m. Your travel time can differ by up to 3h 42m. Colorado Springs and Illinois are separated by a distance of 771 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Colorado Springs to Illinois one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $78. However, be on the lookout for offers from United Airlines and Southwest, as they are both options that can get you from Colorado Springs to Illinois for a low price.

  • What are the most popular routes from Colorado Springs to Illinois?

    When deciding which route to take from Colorado Springs to Illinois consider Colorado Springs - Chicago O'Hare Intl, Colorado Springs - Chicago Midway or Colorado Springs - Lambert-St Louis as they are the most popular.

  • What are the most reliable airlines from Colorado Springs to Illinois?

    No one likes to see their flight delayed. When booking a flight from Colorado Springs to Illinois consider choosing United Airlines (87%), Lufthansa (87%) or Emirates (83%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Colorado Springs to Illinois?

    The cheapest flight price from Colorado Springs to Illinois is $132. On average you can expect to pay $333. The most popular route, (Colorado Springs - Chicago O'Hare Intl), can usually be booked for $261.

  • Can I find deals for flights from Colorado Springs to Illinois that include hotel bookings?

    Yes. In addition to deals on Colorado Springs to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Colorado Springs to Illinois?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Colorado Springs to Illinois.

  • Can I find deals for business class flights from Colorado Springs to Illinois?

    Yes. Cheapflights offers flight deals from Colorado Springs to Illinois by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Colorado Springs to Illinois?

    Currently, July is the cheapest month in which you can book a flight from Colorado Springs to Illinois (average of $46). Flying from Colorado Springs to Illinois in June is currently the most expensive (average of $109). 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.

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Top 3 airlines flying from Colorado Springs to Illinois

Discover the top 3 airlines that operate flights from Colorado Springs 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$166Average$447FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$233Average$315FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$291Average$431FlexibilityNo cancel feeOn-time69%

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