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$356+ Cheap flights from Decatur, IL (DEC) to Colorado

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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — DEN
Apr 19 — Apr 261
Sun 4/19
Sun 4/26
1 adult, Economy
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Cheap flight deals from Decatur to Colorado

Cheapest flights from Decatur to Colorado
Explore the most affordable flight options available from Decatur to Colorado. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 20, 2026.

This United Airlines deal was found by Cheapflights users on 3/18. 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 7/237:20 pm
DEC
-
DEN
1 stop6h 39m
United Airlines
Mon 7/277:40 pm
DEN
-
DEC
1 stop21h 31m
United Airlines
Deal found 3/18$428
This United Airlines deal was found by Cheapflights users on 3/19. 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.
Fri 4/177:37 pm
DEC
-
DEN
1 stop5h 22m
United Airlines
Sun 4/198:52 pm
DEN
-
DEC
1 stop20h 05m
United Airlines
Deal found 3/19$438
This United Airlines deal was found by Cheapflights users on 3/17. 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.
Sat 12/126:55 pm
DEC
-
DEN
1 stop13h 47m
United Airlines
Tue 12/157:32 am
DEN
-
DEC
1 stop9h 19m
United Airlines
Deal found 3/17$462
This United Airlines deal was found by Cheapflights users on 3/18. 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 4/27:37 pm
DEC
-
DEN
1 stop5h 22m
United Airlines
Mon 4/67:50 pm
DEN
-
DEC
1 stop16h 04m
United Airlines
Deal found 3/18$509
This United Airlines deal was found by Cheapflights users on 3/20. 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.
Sun 4/197:37 pm
DEC
-
DEN
1 stop14h 18m
United Airlines
Thu 4/237:50 pm
DEN
-
DEC
1 stop12h 08m
United Airlines
Deal found 3/20$515
This United Airlines deal was found by Cheapflights users on 3/16. 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.
Tue 3/317:20 pm
DEC
-
DEN
1 stop21h 40m
United Airlines
Sat 4/48:52 pm
DEN
-
DEC
1 stop20h 05m
United Airlines
Deal found 3/16$580

Find flight deals from Decatur to Colorado

Keep the following information in mind while searching for Decatur to Colorado flight deals. Data was last updated March 20, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$428
(United Airlines)

One-way from

$356
(United Airlines)
Provider with most accurate pricing for Decatur Arpt-Denver Intl flight deals.
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Provider most trusted by Cheapflights users for Decatur Arpt-Denver Intl flights.
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From Decatur Arpt to Colorado
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One-way flight from Decatur Arpt to Colorado
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Decatur to Colorado 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 March 20, 2026.
Use the filters below to find and compare flights from Decatur to Colorado that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Thu 7/23

7:20 pm-12:59 am

1 stop6h 39m

Denver Intl

Mon 7/27

7:40 pm-6:11 pm

1 stop21h 31m

$428
Quickest round-trip

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Thu 4/2

7:37 pm-11:59 pm

1 stop5h 22m

Denver Intl

Mon 4/6

7:50 pm-12:54 pm

1 stop16h 04m

$509

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 4/24

7:37 pm-10:06 am

2 stops15h 29m

Denver Intl

Sun 4/26

6:00 am-8:58 am

1 stop25h 58m

$521

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 4/17

7:37 pm-10:06 am

2 stops15h 29m

Denver Intl

Sun 4/19

7:50 pm-5:57 pm

1 stop21h 07m

$521

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Tue 3/31

7:20 pm-4:00 pm

1 stop21h 40m

Denver Intl

Sat 4/4

8:52 pm-5:57 pm

1 stop20h 05m

$580
Cheapest one-way
Quickest one-way

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Tue 3/31

7:20 pm-4:29 pm

1 stop22h 09m

$356

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sun 3/29

7:20 pm-4:29 pm

1 stop22h 09m

$390

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Sorted by cheapest first

Best time to book a flight from Decatur to Colorado

Have a flexible travel schedule? Discover the best time to fly to Colorado from Decatur 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 Decatur to Colorado

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

Currently, September is the cheapest month in which you can book a flight from Decatur, Illinois to Colorado (average of $48). Flying from Decatur, Illinois to Colorado in February is currently the most expensive (average of $250). 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.

Related info for your journey

Find useful and relevant information for your journey from Decatur to Colorado. 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 Decatur to Colorado?

    Decatur Arpt (DEC), located 4.7 mi from the city center, is the airport you fly out of when you book flights from Decatur to Colorado.

  • How long is the flight from Decatur, Illinois to Colorado?

    There are many flights that can get you from Decatur, Illinois to Colorado in 6h 39m. Fly via United Airlines to get the fastest option. There are 837 mi between Decatur, Illinois and Colorado.

  • Can I find deals for flights from Decatur to Colorado that include hotel bookings?

    Yes. In addition to deals on Decatur to Colorado flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Decatur to Colorado?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Decatur to Colorado.

  • Can I find deals for business class flights from Decatur to Colorado?

    Yes. Cheapflights offers flight deals from Decatur to Colorado 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 Decatur, Illinois to Colorado?

    Currently, September is the cheapest month in which you can book a flight from Decatur, Illinois to Colorado (average of $48). Flying from Decatur, Illinois to Colorado in February is currently the most expensive (average of $250). 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.

See more FAQs

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