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$128+ 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 4/16. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
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 February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$275
(Delta)

One-way from

$128
(Southwest)

Popular in

October

Cheapest in

February

Average price

$309

Good round-trip deal

$346 or less

Good one-way deal

$158 or less
Provider with most accurate pricing for Colorado Springs-Chicago (CHI) flight deals.
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Provider most trusted by Cheapflights users for Colorado Springs-Chicago (CHI) flights.
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From Colorado Springs to Illinois
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One-way flight from Colorado Springs to Illinois
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($32 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($7 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2025
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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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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 February 20, 2025.

This Delta deal was found by Cheapflights users on 2/20. 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.
Sat 9/201:40 pmCOS - MLI
1 stop7h 49mDelta
Tue 9/235:55 amMLI - COS
1 stop7h 55mDelta
Deal found 2/20$229
This Delta deal was found by Cheapflights users on 2/20. 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.
Wed 4/28:15 amCOS - ORD
1 stop8h 31mDelta
Wed 4/91:45 pmORD - COS
1 stop6h 20mDelta
Deal found 2/20$275
This Southwest deal was found by Cheapflights users on 2/20. 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.
Wed 3/261:10 pmCOS - MDW
Nonstop2h 20mSouthwest
Fri 3/2810:05 amMDW - COS
Nonstop2h 40mSouthwest
Deal found 2/20$283
This United Airlines deal was found by Cheapflights users on 2/20. 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 4/27:30 amCOS - ORD
1 stop6h 25mUnited Airlines
Wed 4/99:30 amORD - COS
Nonstop3h 05mUnited Airlines
Deal found 2/20$284
This Delta deal was found by Cheapflights users on 2/19. 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.
Thu 4/246:00 amCOS - STL
1 stop8h 00mDelta
Sun 4/275:32 pmSTL - COS
1 stop6h 36mDelta
Deal found 2/19$292
This Southwest deal was found by Cheapflights users on 2/20. 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.
Sat 4/122:45 pmCOS - ORD
1 stop6h 15mSouthwest
Mon 4/145:25 pmORD - COS
1 stop7h 10mSouthwest
Deal found 2/20$295
This United Airlines deal was found by Cheapflights users on 2/20. 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 3/712:55 pmCOS - PIA
1 stop7h 44mUnited Airlines
Tue 3/116:45 amPIA - COS
1 stop5h 52mUnited Airlines
Deal found 2/20$301
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Fri 6/612:13 pmCOS - ORD
Nonstop2h 44mAmerican Airlines
Fri 6/209:45 amORD - COS
Nonstop2h 45mAmerican Airlines
Deal found 2/19$311
This United Airlines deal was found by Cheapflights users on 2/20. 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 3/73:35 pmCOS - MLI
1 stop4h 26mUnited Airlines
Tue 3/116:30 amMLI - COS
1 stop6h 07mUnited Airlines
Deal found 2/20$320
This American Airlines deal was found by Cheapflights users on 2/19. 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.
Thu 3/612:35 pmCOS - STL
1 stop19h 09mAmerican Airlines
Mon 3/105:37 pmSTL - COS
1 stop7h 10mAmerican Airlines
Deal found 2/19$330
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/306:24 pmCOS - ORD
3 stops39h 45mMultiple Airlines
Wed 4/22:34 pmORD - COS
2 stops28h 02mMultiple Airlines
Deal found 2/20$361
This Southwest deal was found by Cheapflights users on 2/19. 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.
Thu 3/136:15 pmCOS - STL
1 stop5h 40mSouthwest
Fri 3/285:45 amSTL - COS
1 stop5h 25mSouthwest
Deal found 2/19$367

Find flights from Colorado Springs to Illinois within your budget

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 February 20, 2025.

Fly from

Colorado Springs

Fly to

Illinois

Route

Depart

Return

Price

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 4/2

8:15 am-5:46 pm

1 stop8h 31m

Chicago O'Hare Intl

Wed 4/9

1:45 pm-7:05 pm

1 stop6h 20m

$275

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

Wed 3/26

1:10 pm-4:30 pm

Nonstop2h 20m

Chicago Midway

Fri 3/28

10:05 am-11:45 am

Nonstop2h 40m

$283

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 4/2

7:30 am-2:55 pm

1 stop6h 25m

Chicago O'Hare Intl

Wed 4/9

9:30 am-11:35 am

Nonstop3h 05m

$284

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 4/24

6:00 am-3:00 pm

1 stop8h 00m

Lambert-St Louis

Sun 4/27

5:32 pm-11:08 pm

1 stop6h 36m

$292

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Sat 4/12

2:45 pm-10:00 pm

1 stop6h 15m

Chicago O'Hare Intl

Mon 4/14

5:25 pm-11:35 pm

1 stop7h 10m

$295

Colorado SpringsPeoria

COS - PIA

COSPIA

Colorado Springs

Fri 3/7

12:55 pm-9:39 pm

1 stop7h 44m

Greater Peoria

Tue 3/11

6:45 am-11:37 am

1 stop5h 52m

$301

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Fri 6/6

12:13 pm-3:57 pm

Nonstop2h 44m

Chicago O'Hare Intl

Fri 6/20

9:45 am-11:30 am

Nonstop2h 45m

$311

Colorado SpringsMoline

COS - MLI

COSMLI

Colorado Springs

Fri 3/7

3:35 pm-9:01 pm

1 stop4h 26m

Moline Quad-City

Tue 3/11

6:30 am-11:37 am

1 stop6h 07m

$320

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 3/6

12:35 pm-8:44 am

1 stop19h 09m

Lambert-St Louis

Mon 3/10

5:37 pm-11:47 pm

1 stop7h 10m

$330

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Sun 3/30

6:24 pm-11:09 am

3 stops39h 45m

Chicago O'Hare Intl

Wed 4/2

2:34 pm-5:36 pm

2 stops28h 02m

$361

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/18

Showing 1-10 of 31 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.

Travel insights for flights from Colorado Springs to Illinois

Get recent, data-driven insights about flights from Colorado Springs to Illinois including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Colorado Springs to Illinois (average of $245). Flying from Colorado Springs 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 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 February 20, 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.

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 February 20, 2025.
See what other customers who have flown with Southwest, Delta and United Airlines from Colorado Springs to Illinois have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Southwest
8.1
Very good
4,411 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Delta
8.0
Very good
8,220 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

United Airlines
7.4
Good
8,766 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

Allegiant Air
7.3
Good
765 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,411 reviews

Crew

8.7

Comfort

8.1

Entertainment

7.6

Overall

8.1

Boarding

8.2

Food

7.1

Reviews

1 / 20

2.0
Mediocre

Anonymous,Feb 2025

MCO - STL

Cancelled at last minute, SWA unable to assist in formulating alternate plans. Wound up renting a car and driving 13 hours to beat bad weather forecast at home. Not SWA’s fault that there was significant bad weather across the country.

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.

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

    The cheapest airline one-way is Southwest, with whom users have recently found tickets for as low as $128. However, be on the lookout for offers from United Airlines and Delta, 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 Lufthansa (95%), Emirates (88%) or SkyWest Airlines (76%) 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 $127. On average you can expect to pay $419. The most popular route, (Colorado Springs - Chicago O'Hare Intl), can usually be booked for $280.

  • 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, August is the cheapest month in which you can book a flight from Colorado Springs to Illinois (average of $245). Flying from Colorado Springs 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.

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Alternative routes for Colorado Springs to Illinois

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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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$254Average$431FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$260Average$422FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$291Average$384FlexibilityNo cancel feeOn-time63%
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