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$366+ Cheap flights from Decatur, IL to Denver (DEC - DEN)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/4. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — DEN
Feb 14 — Feb 211
Sat 2/14
Sat 2/21
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 January 15, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$366
(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 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 January 15, 2026.

This United Airlines deal was found by Cheapflights users on 1/14. 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.
Sat 4/47:20 pm
DEC
-
DEN
1 stop5h 24m
United Airlines
Wed 4/88:52 pm
DEN
-
DEC
1 stop11h 06m
United Airlines
Deal found 1/14$366
This United Airlines deal was found by Cheapflights users on 1/14. 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.
Sat 3/147:15 pm
DEC
-
DEN
1 stop5h 15m
United Airlines
Sat 3/215:54 pm
DEN
-
DEC
1 stop13h 58m
United Airlines
Deal found 1/14$372
This United Airlines deal was found by Cheapflights users on 1/14. 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.
Sat 3/147:15 pm
DEC
-
DEN
1 stop5h 15m
United Airlines
Sun 3/227:45 am
DEN
-
DEC
1 stop24h 07m
United Airlines
Deal found 1/14$388
This United Airlines deal was found by Cheapflights users on 1/15. 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 3/67:15 pm
DEC
-
DEN
1 stop5h 15m
United Airlines
Sun 3/86:00 am
DEN
-
DEC
1 stop10h 53m
United Airlines
Deal found 1/15$390
This United Airlines deal was found by Cheapflights users on 1/14. 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.
Thu 1/299:49 am
DEC
-
DEN
1 stop7h 45m
United Airlines
Mon 2/26:00 am
DEN
-
DEC
1 stop26h 05m
United Airlines
Deal found 1/14$430
This United Airlines deal was found by Cheapflights users on 1/13. 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 4/117:20 pm
DEC
-
DEN
1 stop5h 24m
United Airlines
Wed 4/155:55 pm
DEN
-
DEC
2 stops23h 07m
United Airlines
Deal found 1/13$448
This United Airlines deal was found by Cheapflights users on 1/15. 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 2/217:15 pm
DEC
-
DEN
1 stop14h 48m
United Airlines
Sun 3/17:45 am
DEN
-
DEC
1 stop24h 07m
United Airlines
Deal found 1/15$455
This United Airlines deal was found by Cheapflights users on 1/15. 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 1/309:49 am
DEC
-
DEN
1 stop24h 00m
United Airlines
Tue 2/38:25 pm
DEN
-
DEC
1 stop20h 36m
United Airlines
Deal found 1/15$487

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 January 15, 2026.
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

Sat 4/4

7:20 pm-11:44 pm

1 stop5h 24m

Denver Intl

Wed 4/8

8:52 pm-8:58 am

1 stop11h 06m

$366

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sat 4/11

7:20 pm-11:44 pm

1 stop5h 24m

Denver Intl

Wed 4/15

8:52 pm-8:58 am

1 stop11h 06m

$366

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sat 3/14

7:15 pm-11:30 pm

1 stop5h 15m

Denver Intl

Sat 3/21

5:54 pm-8:52 am

1 stop13h 58m

$372

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sat 3/14

7:15 pm-11:30 pm

1 stop5h 15m

Denver Intl

Sun 3/22

7:45 am-8:52 am

1 stop24h 07m

$388

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 3/6

7:15 pm-11:30 pm

1 stop5h 15m

Denver Intl

Sun 3/8

6:00 am-5:53 pm

1 stop10h 53m

$390

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Thu 1/29

9:49 am-4:34 pm

1 stop7h 45m

Denver Intl

Mon 2/2

6:00 am-9:05 am

1 stop26h 05m

$430

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Wed 2/4

7:09 pm-12:38 pm

1 stop18h 29m

Denver Intl

Mon 2/9

8:25 pm-6:01 pm

1 stop20h 36m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Compare providers for flights from Decatur to Denver

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Decatur to Denver in January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Decatur, Illinois-Denver flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Decatur, Illinois-Denver flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Decatur, Illinois-Denver flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Decatur, Illinois-Denver flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Decatur, Illinois-Denver flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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, September is the cheapest month in which you can book a flight from Decatur, Illinois to Denver (average of $49). Flying from Decatur, Illinois to Denver in March is currently the most expensive (average of $166). 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.

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

    A quick flight from Decatur, Illinois to Denver can take about 5h 24m. United Airlines provides one of the quickest options available for as low as $366. There are 837 mi between Decatur, Illinois and Denver.

  • 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, September is the cheapest month in which you can book a flight from Decatur, Illinois to Denver (average of $49). Flying from Decatur, Illinois to Denver in March is currently the most expensive (average of $166). 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
Thornton
Black Hawk
Lakewood
Broomfield
Westminster
Golden
Greeley
Lone Tree
Wheat Ridge
Cripple Creek
Winter Park
Silverthorne
Central City
Centennial
Manitou Springs
Frisco
Fort Morgan
Brighton
Evergreen
Idaho Springs

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