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$88+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
nov. 28 — dic. 51
vie. 11/28
vie. 12/5
1 adult, Economy
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Cheap 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 octubre 29, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$236
(United Airlines)

One-way from

$88
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$217

Good round-trip deal

$348 or less

Good one-way deal

$180 or less
Provider with most accurate pricing for Denver Intl-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Chicago (CHI) flights.
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From Colorado Springs to Illinois
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One-way flight from Colorado Springs to Illinois
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Highest demand for flights based on searches. 6% potential increase in price ($14 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).
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Average for round-trip flights in October 2025
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Price to beat on a round-trip flight from Colorado Springs to Illinois.
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Price to beat on a one-way flight from Colorado Springs to Illinois.
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Find 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 octubre 29, 2025.

This United Airlines deal was found by Cheapflights users on 10/27. 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.
mié. 12/1712:50 pmCOS - ORD
Nonstop2h 46mUnited Airlines
sáb. 1/178:50 amORD - COS
Nonstop3h 12mUnited Airlines
Deal found 10/27$236
This United Airlines deal was found by Cheapflights users on 10/29. 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.
jue. 11/209:22 amCOS - PIA
1 stop6h 18mUnited Airlines
lun. 11/248:43 amPIA - COS
1 stop5h 31mUnited Airlines
Deal found 10/29$249
This American Airlines deal was found by Cheapflights users on 10/29. 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.
lun. 11/2412:36 pmCOS - ORD
Nonstop2h 46mAmerican Airlines
jue. 12/49:55 amORD - COS
Nonstop3h 07mAmerican Airlines
Deal found 10/29$253
This Southwest deal was found by Cheapflights users on 10/27. 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.
mié. 12/176:35 amCOS - MDW
1 stop8h 45mSouthwest
sáb. 1/175:35 amMDW - COS
1 stop7h 05mSouthwest
Deal found 10/27$256
This American Airlines deal was found by Cheapflights users on 10/28. 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.
jue. 12/1112:36 pmCOS - ORD
Nonstop2h 45mAmerican Airlines
sáb. 12/1310:06 amORD - COS
Nonstop3h 02mAmerican Airlines
Deal found 10/28$258
This American Airlines deal was found by Cheapflights users on 10/27. 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.
mar. 11/115:17 pmCOS - PIA
1 stop4h 49mAmerican Airlines
sáb. 11/156:40 amPIA - COS
1 stop5h 51mAmerican Airlines
Deal found 10/27$259
This Delta deal was found by Cheapflights users on 10/27. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/178:10 amCOS - MDW
2 stops14h 37mDelta
sáb. 1/176:45 amMDW - COS
1 stop6h 39mDelta
Deal found 10/27$261
This United Airlines deal was found by Cheapflights users on 10/28. 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.
sáb. 12/1312:50 pmCOS - ORD
Nonstop2h 46mUnited Airlines
mar. 12/167:55 pmORD - COS
Nonstop3h 02mUnited Airlines
Deal found 10/28$261
This Southwest deal was found by Cheapflights users on 10/27. 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.
jue. 12/186:35 pmCOS - MDW
1 stop4h 30mSouthwest
sáb. 1/175:35 amMDW - COS
1 stop7h 05mSouthwest
Deal found 10/27$263
This United Airlines deal was found by Cheapflights users on 10/27. 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.
mar. 11/116:00 amCOS - PIA
2 stops7h 33mUnited Airlines
sáb. 11/158:43 amPIA - COS
1 stop4h 30mUnited Airlines
Deal found 10/27$264
This Southwest deal was found by Cheapflights users on 10/28. 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.
jue. 12/115:15 amCOS - MDW
1 stop6h 25mSouthwest
sáb. 12/135:15 amMDW - COS
1 stop8h 35mSouthwest
Deal found 10/28$278
This Delta deal was found by Cheapflights users on 10/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/111:42 pmCOS - ORD
1 stop7h 14mDelta
sáb. 12/135:29 pmORD - COS
1 stop5h 56mDelta
Deal found 10/28$278

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 octubre 29, 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

mié. 12/17

12:50 pm-4:36 pm

Nonstop2h 46m

Chicago O'Hare Intl

sáb. 1/17

12:53 pm-5:23 pm

1 stop5h 30m

$246

Colorado SpringsPeoria

COS - PIA

COSPIA

Colorado Springs

jue. 11/20

9:22 am-4:40 pm

1 stop6h 18m

Greater Peoria

lun. 11/24

8:43 am-1:14 pm

1 stop5h 31m

$249

Colorado SpringsPeoria

COS - PIA

COSPIA

Colorado Springs

mar. 11/11

5:17 pm-11:06 pm

1 stop4h 49m

Greater Peoria

sáb. 11/15

6:40 am-11:31 am

1 stop5h 51m

$259

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

mié. 12/17

8:10 am-11:47 pm

2 stops14h 37m

Chicago Midway

sáb. 1/17

6:45 am-12:24 pm

1 stop6h 39m

$261

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

sáb. 11/22

4:37 pm-10:57 pm

1 stop5h 20m

Chicago O'Hare Intl

lun. 11/24

10:02 am-12:06 pm

Nonstop3h 04m

$261

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

sáb. 12/13

12:50 pm-4:36 pm

Nonstop2h 46m

Chicago O'Hare Intl

mar. 12/16

7:55 pm-9:57 pm

Nonstop3h 02m

$261

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

sáb. 12/13

12:38 pm-4:23 pm

Nonstop2h 45m

Chicago O'Hare Intl

mar. 12/16

9:55 am-12:02 pm

Nonstop3h 07m

$261

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

jue. 12/18

6:35 pm-12:05 am

1 stop4h 30m

Chicago Midway

sáb. 1/17

5:35 am-11:40 am

1 stop7h 05m

$263

Colorado SpringsPeoria

COS - PIA

COSPIA

Colorado Springs

mar. 11/11

6:00 am-2:33 pm

2 stops7h 33m

Greater Peoria

sáb. 11/15

8:43 am-12:13 pm

1 stop4h 30m

$264

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

jue. 12/11

1:42 pm-9:56 pm

1 stop7h 14m

Chicago O'Hare Intl

sáb. 12/13

5:29 pm-10:25 pm

1 stop5h 56m

$278

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 52 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 $110). 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 octubre 29, 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.

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 octubre 29, 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
8.0
Very good
4,241 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
United Airlines
7.4
Good
8,999 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines
American Airlines
7.2
Good
11,032 reviews
Southwest
8.0
Very good
4,241 reviews

Entertainment

7.5

Boarding

8.1

Food

7.0

Overall

8.0

Comfort

8.0

Crew

8.6

Reviews

1 / 20
2.0
Mediocre

Mike,Aug 2025

OKC - AUS

AC was not adequate, even on a night flight. WiFi subpar even for the airlines

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, American Airlines, and Delta can get you from Colorado Springs to Illinois in just under 2h 46m. Your travel time can differ by up to 11h 51m. Colorado Springs and Illinois are separated by a distance of 908 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 Delta, with whom users have recently found tickets for as low as $121. However, be on the lookout for offers from Southwest and American Airlines, 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 (86%), Qatar Airways (80%) or SkyWest Airlines (78%) 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 $122. On average you can expect to pay $446. The most popular route, (Colorado Springs - Chicago O'Hare Intl), can usually be booked for $236.

  • 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 $110). 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 octubre 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$166Average$456FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$233Average$326FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$290Average$444FlexibilityNo cancel feeOn-time69%

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