Illinois

$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 3/4. Fares are subject to change and may not be available on all flights or dates of travel.
COS — ORD
Feb 10 — Feb 171
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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 February 5, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$249
(United Airlines)

One-way from

$128
(Southwest)

Popular in

October

Cheapest in

February

Average price

$312

Good round-trip deal

$366 or less

Good one-way deal

$158 or less
Provider with most accurate pricing for Colorado Springs-Chicago (CHI) flight deals.
Provider most trusted by Cheapflights users for Colorado Springs-Chicago (CHI) flights.
From Colorado Springs to Illinois
One-way flight from Colorado Springs to Illinois
Highest demand for flights based on searches. 7% potential increase in price ($29 potential increase over avg. RT price).
Cheapest flight prices on average. 1% potential price decrease ($6 potential savings vs. average RT price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from Colorado Springs to Illinois.
Price to beat on a one-way flight from Colorado Springs to Illinois.

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 5, 2025.

This United Airlines deal was found by Cheapflights users on 2/4. 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 3/512:40 pmCOS - MLI
1 stop7h 40mUnited Airlines
Tue 3/118:40 amMLI - COS
1 stop6h 56mUnited Airlines
Deal found 2/4$249
This Delta deal was found by Cheapflights users on 2/4. 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 3/58:20 amCOS - ORD
1 stop9h 03mDelta
Wed 3/121:45 pmORD - COS
1 stop6h 16mDelta
Deal found 2/4$275
This United Airlines deal was found by Cheapflights users on 2/5. 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 3/79:20 amCOS - STL
1 stop6h 14mUnited Airlines
Mon 3/104:30 pmSTL - COS
1 stop6h 30mUnited Airlines
Deal found 2/5$277
This Delta deal was found by Cheapflights users on 2/4. 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 3/56:00 amCOS - MDW
2 stops11h 11mDelta
Tue 3/119:54 amMDW - COS
1 stop9h 07mDelta
Deal found 2/4$280
This United Airlines deal was found by Cheapflights users on 2/5. 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 3/2612:55 pmCOS - ORD
Nonstop2h 44mUnited Airlines
Sun 3/307:50 pmORD - COS
1 stop5h 09mUnited Airlines
Deal found 2/5$293
This American Airlines deal was found by Cheapflights users on 2/4. 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 4/26:00 amCOS - ORD
1 stop6h 06mAmerican Airlines
Sun 4/65:00 amORD - COS
1 stop5h 52mAmerican Airlines
Deal found 2/4$303
This Southwest deal was found by Cheapflights users on 2/3. 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 5/55:50 pmCOS - MDW
1 stop5h 35mSouthwest
Fri 5/94:35 pmMDW - COS
1 stop6h 00mSouthwest
Deal found 2/3$314
This Southwest deal was found by Cheapflights users on 2/4. 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 2/276:30 amCOS - ORD
1 stop6h 55mSouthwest
Sun 3/25:45 pmORD - COS
1 stop5h 40mSouthwest
Deal found 2/4$314
This Southwest deal was found by Cheapflights users on 2/3. 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 5/95:05 pmCOS - STL
1 stop6h 30mSouthwest
Sun 5/116:40 amSTL - COS
1 stop7h 05mSouthwest
Deal found 2/3$323
This American Airlines deal was found by Cheapflights users on 2/5. 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 2/194:50 pmCOS - STL
1 stop4h 53mAmerican Airlines
Mon 2/245:10 amSTL - COS
1 stop5h 45mAmerican Airlines
Deal found 2/5$327
This United Airlines deal was found by Cheapflights users on 2/5. 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 2/206:00 amCOS - PIA
2 stops6h 47mUnited Airlines
Mon 2/245:20 pmPIA - COS
2 stops7h 39mUnited Airlines
Deal found 2/5$339
This American Airlines deal was found by Cheapflights users on 2/5. 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 2/206:00 amCOS - SPI
2 stops11h 14mAmerican Airlines
Mon 2/241:11 pmSPI - COS
2 stops10h 18mAmerican Airlines
Deal found 2/5$437

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 5, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Colorado SpringsMoline

COS - MLI

COSMLI

Colorado Springs

Wed 3/5

12:40 pm-9:20 pm

1 stop7h 40m

Moline Quad-City

Tue 3/11

8:40 am-2:36 pm

1 stop6h 56m

$249

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 3/5

8:20 am-6:23 pm

1 stop9h 03m

Chicago O'Hare Intl

Wed 3/12

1:45 pm-7:01 pm

1 stop6h 16m

$275

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Fri 3/7

9:20 am-4:34 pm

1 stop6h 14m

Lambert-St Louis

Mon 3/10

4:30 pm-10:00 pm

1 stop6h 30m

$277

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

Wed 3/5

6:00 am-6:11 pm

2 stops11h 11m

Chicago Midway

Tue 3/11

9:54 am-6:01 pm

1 stop9h 07m

$280

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 3/26

12:55 pm-4:39 pm

Nonstop2h 44m

Chicago O'Hare Intl

Sun 3/30

7:50 pm-11:59 pm

1 stop5h 09m

$293

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Wed 4/2

6:00 am-1:06 pm

1 stop6h 06m

Chicago O'Hare Intl

Sun 4/6

5:00 am-9:52 am

1 stop5h 52m

$303

Colorado SpringsChicago

COS - MDW

COSMDW

Colorado Springs

Mon 5/5

5:50 pm-12:25 am

1 stop5h 35m

Chicago Midway

Fri 5/9

4:35 pm-9:35 pm

1 stop6h 00m

$314

Colorado SpringsChicago

COS - ORD

COSORD

Colorado Springs

Thu 2/27

6:30 am-2:25 pm

1 stop6h 55m

Chicago O'Hare Intl

Sun 3/2

5:45 pm-10:25 pm

1 stop5h 40m

$314

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Fri 5/9

5:05 pm-12:35 am

1 stop6h 30m

Lambert-St Louis

Sun 5/11

6:40 am-12:45 pm

1 stop7h 05m

$323

Colorado SpringsSt. Louis

COS - STL

COSSTL

Colorado Springs

Wed 2/19

4:50 pm-10:43 pm

1 stop4h 53m

Lambert-St Louis

Mon 2/24

5:10 am-9:55 am

1 stop5h 45m

$327

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/4

Showing 1-10 of 25 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 $323). 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 5, 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 February 5, 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 February 5, 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.

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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.

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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.

8.0
Very good

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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.

Crew

8.7

Entertainment

7.7

Comfort

8.1

Food

7.1

Boarding

8.2

Overall

8.1

Reviews

1 / 20

6.0
Good

Lauren,Dec 2024

MCI - DCA

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.