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$76+ 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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$213
(United Airlines)

One-way from

$76
(United Airlines)

Popular in

October

Cheapest in

February

Average price

$361

Good round-trip deal

$352 or less

Good one-way deal

$138 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
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Highest demand for flights based on searches. 10% potential increase in price ($40 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).
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Average for round-trip flights in April 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 April 17, 2025.

This United Airlines deal was found by Cheapflights users on 4/15. 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.
Tue 5/612:55 pmCOS - ORD
Nonstop2h 48mUnited Airlines
Thu 5/85:05 amORD - COS
1 stop4h 39mUnited Airlines
Deal found 4/15$213
This American Airlines deal was found by Cheapflights users on 4/16. 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.
Sat 6/712:01 pmCOS - ORD
Nonstop2h 39mAmerican Airlines
Tue 6/109:42 amORD - COS
Nonstop2h 49mAmerican Airlines
Deal found 4/16$217
This Delta deal was found by Cheapflights users on 4/15. 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.
Tue 5/66:00 amCOS - ORD
1 stop7h 17mDelta
Thu 5/81:30 pmORD - COS
1 stop8h 30mDelta
Deal found 4/15$246
This Southwest deal was found by Cheapflights users on 4/17. 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 6/1012:30 pmCOS - MDW
1 stop5h 45mSouthwest
Thu 6/125:35 pmMDW - COS
Nonstop2h 35mSouthwest
Deal found 4/17$248
This American Airlines deal was found by Cheapflights users on 4/16. 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 6/1712:45 pmCOS - STL
1 stop7h 09mAmerican Airlines
Sat 6/215:37 amSTL - COS
1 stop5h 23mAmerican Airlines
Deal found 4/16$271
This Southwest deal was found by Cheapflights users on 4/16. 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.
Fri 7/43:00 pmCOS - ORD
1 stop7h 05mSouthwest
Tue 7/156:55 pmORD - COS
1 stop4h 45mSouthwest
Deal found 4/16$273
This Delta deal was found by Cheapflights users on 4/17. 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 8/911:35 amCOS - MDW
1 stop5h 28mDelta
Wed 8/206:00 amMDW - COS
1 stop7h 50mDelta
Deal found 4/17$275
This United Airlines deal was found by Cheapflights users on 4/17. 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 5/22:00 pmCOS - PIA
1 stop5h 51mUnited Airlines
Tue 5/68:50 amPIA - COS
1 stop6h 53mUnited Airlines
Deal found 4/17$279
This Delta deal was found by Cheapflights users on 4/15. 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 7/96:00 amCOS - STL
1 stop5h 24mDelta
Sun 7/136:30 amSTL - COS
1 stop5h 14mDelta
Deal found 4/15$299
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Sun 5/2510:35 amCOS - STL
1 stop4h 56mUnited Airlines
Tue 5/275:20 amSTL - COS
1 stop4h 31mUnited Airlines
Deal found 4/16$304
This Southwest deal was found by Cheapflights users on 4/16. 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 7/86:10 amCOS - STL
2 stops6h 55mSouthwest
Tue 7/85:45 pmSTL - COS
1 stop6h 10mSouthwest
Deal found 4/16$332
This American Airlines deal was found by Cheapflights users on 4/16. 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 7/94:55 pmCOS - PIA
1 stop5h 12mAmerican Airlines
Sat 7/124:41 pmPIA - COS
1 stop6h 35mAmerican Airlines
Deal found 4/16$348

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 April 17, 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 5/6

12:55 pm-4:43 pm

Nonstop2h 48m

Chicago O'Hare Intl

Thu 5/8

5:05 am-8:44 am

1 stop4h 39m

$213

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Sat 6/7

12:01 pm-3:40 pm

Nonstop2h 39m

Chicago O'Hare Intl

Tue 6/10

9:42 am-11:31 am

Nonstop2h 49m

$217

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Tue 5/6

6:00 am-2:17 pm

1 stop7h 17m

Chicago O'Hare Intl

Thu 5/8

1:30 pm-9:00 pm

1 stop8h 30m

$246

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

Tue 6/10

12:30 pm-7:15 pm

1 stop5h 45m

Chicago Midway

Thu 6/12

5:35 pm-7:10 pm

Nonstop2h 35m

$248

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Tue 6/17

12:45 pm-8:54 pm

1 stop7h 09m

Lambert-St Louis

Sat 6/21

5:37 am-10:00 am

1 stop5h 23m

$271

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Fri 7/4

3:00 pm-11:05 pm

1 stop7h 05m

Chicago O'Hare Intl

Tue 7/15

6:55 pm-10:40 pm

1 stop4h 45m

$273

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

Sat 8/9

11:35 am-6:03 pm

1 stop5h 28m

Chicago Midway

Wed 8/20

6:00 am-12:50 pm

1 stop7h 50m

$275

Colorado SpringsPeoria

COS - PIA

COSPIA

Colorado Springs

Fri 5/2

2:00 pm-8:51 pm

1 stop5h 51m

Greater Peoria

Tue 5/6

8:50 am-2:43 pm

1 stop6h 53m

$279

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Wed 7/9

6:00 am-12:24 pm

1 stop5h 24m

Lambert-St Louis

Sun 7/13

6:30 am-10:44 am

1 stop5h 14m

$299

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Sun 5/25

10:35 am-4:31 pm

1 stop4h 56m

Lambert-St Louis

Tue 5/27

5:20 am-8:51 am

1 stop4h 31m

$304

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 28 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, 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 April 17, 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 April 17, 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
8.0
Very good
4,280 reviews

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.0
Very good
4,280 reviews
Southwest
8.0
Very good
4,280 reviews

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,917 reviews
Southwest
8.0
Very good
4,280 reviews

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,667 reviews
Southwest
8.0
Very good
4,280 reviews

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.0
Very good
4,280 reviews

Comfort

8.0

Overall

8.0

Food

7.1

Crew

8.6

Boarding

8.2

Entertainment

7.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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 United Airlines, with whom users have recently found tickets for as low as $76. However, be on the lookout for offers from Delta 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 Emirates (90%), Lufthansa (87%) or SkyWest Airlines (86%) 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 $728. The most popular route, (Colorado Springs - Chicago O'Hare Intl), can usually be booked for $213.

  • 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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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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$228Average$404FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$265Average$344FlexibilityNo cancel feeOn-time63%
United AirlinesCheapest$268Average$445FlexibilityNo cancel feeOn-time69%

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