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$351+ 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 9/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — DEN
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Decatur to Colorado

Keep the following information in mind while searching for Decatur to Colorado flight deals. Data was last updated September 15, 2025.

Round-trip from

$423
(United Airlines)

One-way from

$351
(United Airlines)
From Decatur Arpt to Colorado
Search Deals
One-way flight from Decatur Arpt to Colorado
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Find 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 September 15, 2025.

This United Airlines deal was found by Cheapflights users on 9/14. 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 11/27:08 pmDEC - DEN
1 stop5h 07mUnited Airlines
Sat 11/84:06 pmDEN - DEC
1 stop15h 42mUnited Airlines
Deal found 9/14$423
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/296:55 pmDEC - DEN
1 stop5h 35mUnited Airlines
Fri 10/36:00 amDEN - DEC
1 stop25h 51mUnited Airlines
Deal found 9/14$425
This United Airlines deal was found by Cheapflights users on 9/14. 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 11/27:08 pmDEC - DEN
1 stop5h 07mUnited Airlines
Thu 11/67:46 amDEN - DEC
1 stop9h 06mUnited Airlines
Deal found 9/14$439
This United Airlines deal was found by Cheapflights users on 9/13. 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 9/209:42 amDEC - DEN
1 stop6h 57mUnited Airlines
Mon 9/227:10 pmDEN - DEC
1 stop12h 46mUnited Airlines
Deal found 9/13$484

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 September 15, 2025.
Use the filters below to find and compare flights from Decatur to Colorado that are best for you.

Fly from

Decatur

Fly to

Colorado

Route

Depart

Return

Price

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sun 11/2

7:08 pm-11:15 pm

1 stop5h 07m

Denver Intl

Sat 11/8

4:06 pm-8:48 am

1 stop15h 42m

$423

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Mon 9/29

6:55 pm-11:30 pm

1 stop5h 35m

Denver Intl

Fri 10/3

6:00 am-8:51 am

1 stop25h 51m

$425

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sun 11/2

7:08 pm-11:15 pm

1 stop5h 07m

Denver Intl

Thu 11/6

7:46 am-5:52 pm

1 stop9h 06m

$439

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sun 9/21

6:55 pm-6:41 am

1 stop12h 46m

$351

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

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, October is the cheapest month in which you can book a flight from Decatur, Illinois to Colorado (average of $197). Flying from Decatur, Illinois to Colorado in March is currently the most expensive (average of $278). 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 5h 07m. 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, October is the cheapest month in which you can book a flight from Decatur, Illinois to Colorado (average of $197). Flying from Decatur, Illinois to Colorado in March is currently the most expensive (average of $278). 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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