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$129+ 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 2/22. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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Cheap flight deals from Colorado Springs to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Colorado Springs (COS) to Illinois (USIL). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 21, 2025.

Round-trip from

$265
(United Airlines)

One-way from

$129
(Delta)

Good round-trip deal

$356 or less

Good one-way deal

$188 or less
From Colorado Springs to Illinois
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One-way flight from Colorado Springs to Illinois
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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 January 21, 2025.

This United Airlines deal was found by Cheapflights users on 1/21. 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.
Mon 3/35:15 pmCOS - ORD
1 stop5h 43mUnited Airlines
Tue 3/49:30 amORD - COS
Nonstop3h 07mUnited Airlines
Deal found 1/21$265
This Southwest deal was found by Cheapflights users on 1/21. 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 2/136:30 amCOS - STL
1 stop4h 05mSouthwest
Wed 2/197:50 amSTL - COS
1 stop7h 35mSouthwest
Deal found 1/21$267
This Delta deal was found by Cheapflights users on 1/21. 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 2/136:00 amCOS - ORD
1 stop8h 45mDelta
Mon 2/171:40 pmORD - COS
1 stop6h 10mDelta
Deal found 1/21$275
This Southwest deal was found by Cheapflights users on 1/21. 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 2/186:00 amCOS - ORD
1 stop8h 00mSouthwest
Tue 2/257:30 amORD - COS
2 stops9h 20mSouthwest
Deal found 1/21$300
This American Airlines deal was found by Cheapflights users on 1/21. 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 2/1310:35 amCOS - STL
1 stop4h 58mAmerican Airlines
Wed 2/199:15 amSTL - COS
1 stop7h 35mAmerican Airlines
Deal found 1/21$310
This American Airlines deal was found by Cheapflights users on 1/21. 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 8/912:13 pmCOS - ORD
Nonstop2h 44mAmerican Airlines
Wed 8/209:45 amORD - COS
Nonstop2h 45mAmerican Airlines
Deal found 1/21$311
This deal was found by Cheapflights users on 1/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/136:00 amCOS - STL
2 stops7h 36mUnited Airlines
Wed 2/1910:18 amSTL - COS
2 stops9h 52mUnited Airlines
Deal found 1/21$318
This deal was found by Cheapflights users on 1/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/138:20 amCOS - STL
2 stops12h 57mDelta
Wed 2/196:43 amSTL - COS
2 stops15h 22mDelta
Deal found 1/21$323
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 4/110:40 amCOS - MLI
2 stops9h 55mUnited Airlines
Wed 4/95:25 pmMLI - COS
2 stops7h 34mUnited Airlines
Deal found 1/20$324
This Southwest deal was found by Cheapflights users on 1/20. 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.
Mon 7/219:55 amCOS - MDW
Nonstop2h 25mSouthwest
Wed 8/132:45 pmMDW - COS
Nonstop2h 25mSouthwest
Deal found 1/20$331
This United Airlines deal was found by Cheapflights users on 1/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/46:00 amCOS - PIA
2 stops7h 58mUnited Airlines
Sat 2/83:36 pmPIA - COS
2 stops7h 22mUnited Airlines
Deal found 1/19$339
This Delta deal was found by Cheapflights users on 1/20. 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 8/911:35 amCOS - MDW
1 stop5h 28mDelta
Wed 8/2010:10 amMDW - COS
2 stops13h 18mDelta
Deal found 1/20$380

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 January 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Mon 3/3

5:15 pm-11:58 pm

1 stop5h 43m

Chicago O'Hare Intl

Tue 3/4

9:30 am-11:37 am

Nonstop3h 07m

$265

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 2/13

6:30 am-11:35 am

1 stop4h 05m

Lambert-St Louis

Wed 2/19

7:50 am-2:25 pm

1 stop7h 35m

$267

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Thu 2/13

6:00 am-3:45 pm

1 stop8h 45m

Chicago O'Hare Intl

Mon 2/17

1:40 pm-6:50 pm

1 stop6h 10m

$275

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Tue 2/18

6:00 am-3:00 pm

1 stop8h 00m

Chicago O'Hare Intl

Tue 2/25

7:30 am-3:50 pm

2 stops9h 20m

$300

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 2/13

10:35 am-4:33 pm

1 stop4h 58m

Lambert-St Louis

Wed 2/19

9:15 am-3:50 pm

1 stop7h 35m

$310

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 2/13

6:00 am-2:36 pm

2 stops7h 36m

Lambert-St Louis

Wed 2/19

10:18 am-7:10 pm

2 stops9h 52m

$318

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Sun 7/20

12:13 pm-3:57 pm

Nonstop2h 44m

Chicago O'Hare Intl

Wed 8/13

5:00 am-9:22 am

1 stop5h 22m

$321

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Thu 2/13

8:20 am-10:17 pm

2 stops12h 57m

Lambert-St Louis

Wed 2/19

6:43 am-9:05 pm

2 stops15h 22m

$323

Colorado SpringsMoline

COS - MLI

COSMLI

Colorado Springs

Tue 4/1

10:40 am-9:35 pm

2 stops9h 55m

Moline Quad-City

Wed 4/9

5:25 pm-11:59 pm

2 stops7h 34m

$324

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

Fri 2/14

3:40 pm-7:00 pm

Nonstop2h 20m

Chicago Midway

Sun 2/16

8:25 am-10:10 am

Nonstop2h 45m

$331

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

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.

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 $320). 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 January 21, 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 January 21, 2025.

The most flights from COS to USIL are scheduled on a Monday (3 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (2 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 January 21, 2025.
See what other customers who have flown with Southwest, United Airlines and Delta 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
4,662 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,662 reviews
Southwest
8.1
Very good
4,662 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,521 reviews
Southwest
8.1
Very good
4,662 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
8,985 reviews
Southwest
8.1
Very good
4,662 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,662 reviews

Overall

8.1

Comfort

8.1

Crew

8.7

Food

7.2

Entertainment

7.7

Boarding

8.2

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

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 Delta, with whom users have recently found tickets for as low as $129. However, be on the lookout for offers from Southwest and United 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 Lufthansa (89%), Emirates (86%) or SkyWest Airlines (77%) 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 $165. On average you can expect to pay $956. The most popular route, (Colorado Springs - Chicago O'Hare Intl), can usually be booked for $311.

  • 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 $320). 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 January 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$237Average$480FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$259Average$436FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$291Average$384FlexibilityNo cancel feeOn-time63%
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