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$211+ Cheap flights from Decatur, IL to Denver (DEC - DEN)

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 9/20. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — DEN
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Decatur to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Decatur (DEC) to Denver (DEN). 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 August 14, 2025.

Round-trip from

$334
(United Airlines)

One-way from

$211
(United Airlines)
From Decatur Arpt to Denver Intl
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One-way flight from Decatur Arpt to Denver Intl
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Find flight deals from Decatur to Denver

Cheapest flights from Decatur to Denver
Explore the most affordable flight options available from Decatur to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This United Airlines deal was found by Cheapflights users on 8/14. 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.
Wed 9/109:42 amDEC - DEN
1 stop5h 55mUnited Airlines
Wed 9/177:10 pmDEN - DEC
1 stop21h 49mUnited Airlines
Deal found 8/14$334
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Thu 9/116:55 pmDEC - DEN
1 stop5h 18mUnited Airlines
Mon 9/157:10 pmDEN - DEC
1 stop12h 46mUnited Airlines
Deal found 8/13$344
This United Airlines deal was found by Cheapflights users on 8/12. 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 11/267:08 pmDEC - DEN
1 stop5h 07mUnited Airlines
Sat 11/2911:55 pmDEN - DEC
1 stop7h 53mUnited Airlines
Deal found 8/12$368
This United Airlines deal was found by Cheapflights users on 8/11. 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 10/26:55 pmDEC - DEN
1 stop5h 35mUnited Airlines
Sat 10/45:40 pmDEN - DEC
2 stops14h 11mUnited Airlines
Deal found 8/11$393
This United Airlines deal was found by Cheapflights users on 8/12. 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 8/279:42 amDEC - DEN
1 stop7h 53mUnited Airlines
Sun 8/317:48 amDEN - DEC
1 stop24h 08mUnited Airlines
Deal found 8/12$409
This United Airlines deal was found by Cheapflights users on 8/12. 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 8/209:42 amDEC - DEN
1 stop7h 53mUnited Airlines
Sat 8/306:00 pmDEN - DEC
1 stop22h 59mUnited Airlines
Deal found 8/12$414
This United Airlines deal was found by Cheapflights users on 8/12. 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 8/229:42 amDEC - DEN
1 stop7h 57mUnited Airlines
Fri 8/298:28 pmDEN - DEC
1 stop11h 28mUnited Airlines
Deal found 8/12$434

Cheapflights Fare Finder

 
Customize your flight search to find flights from Decatur to Denver 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 August 14, 2025.
Use the filters below to find and compare flights from Decatur to Denver that are best for you.

Fly from

Decatur

Fly to

Denver

Route

Depart

Return

Price

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Wed 9/10

9:42 am-4:35 pm

1 stop7h 53m

Denver Intl

Wed 9/17

8:28 pm-8:56 am

1 stop11h 28m

$334

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Thu 9/11

6:55 pm-11:13 pm

1 stop5h 18m

Denver Intl

Mon 9/15

7:10 pm-8:56 am

1 stop12h 46m

$344

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sat 8/30

9:42 am-4:35 pm

1 stop7h 53m

Denver Intl

Sat 8/30

8:45 pm-5:59 pm

2 stops20h 14m

$447

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 8/29

9:42 am-6:41 am

1 stop21h 59m

Denver Intl

Tue 9/2

6:00 pm-5:59 pm

1 stop22h 59m

$454

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Thu 8/28

6:55 pm-6:41 am

1 stop12h 46m

Denver Intl

Mon 9/1

5:48 pm-8:56 am

2 stops14h 08m

$602

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Best time to book a flight from Decatur to Denver

Have a flexible travel schedule? Discover the best time to fly to Denver 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 Denver

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

Currently, October is the cheapest month in which you can book a flight from Decatur, Illinois to Denver (average of $197). Flying from Decatur, Illinois to Denver 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 Denver. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Decatur to Denver 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 Denver?

    Currently, October is the cheapest month in which you can book a flight from Decatur, Illinois to Denver (average of $197). Flying from Decatur, Illinois to Denver 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

Traveling to a place near Denver?

Book flights to Denver if you plan to visit one of these locations
Westminster
Black Hawk
Golden
Winter Park
Greeley
Lone Tree
Lakewood
Cripple Creek
Silverthorne
Thornton
Broomfield
Frisco
Manitou Springs
Grand Lake
Fort Morgan
Glendale
Copper Mountain
Wheat Ridge
Brighton
Longmont

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