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$436+ 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
DEC — DEN
May 10 — May 171
Sun 5/10
Sun 5/17
1 adult, Economy
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Cheap 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 April 10, 2026.

This United Airlines deal was found by Cheapflights users on 4/9. 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 5/157:25 pm
DEC
-
DEN
1 stop5h 25m
United Airlines
Mon 5/189:20 pm
DEN
-
DEC
1 stop14h 34m
United Airlines
Deal found 4/9$436
This United Airlines deal was found by Cheapflights users on 4/5. 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.
Sat 11/146:55 pm
DEC
-
DEN
1 stop5h 08m
United Airlines
Wed 11/183:20 pm
DEN
-
DEC
1 stop16h 26m
United Airlines
Deal found 4/5$438
This United Airlines deal was found by Cheapflights users on 4/9. 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 7/177:20 pm
DEC
-
DEN
1 stop5h 29m
United Airlines
Mon 7/209:05 pm
DEN
-
DEC
1 stop20h 06m
United Airlines
Deal found 4/9$448
This United Airlines deal was found by Cheapflights users on 4/5. 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.
Sat 6/67:05 pm
DEC
-
DEN
1 stop12h 36m
United Airlines
Wed 6/109:05 pm
DEN
-
DEC
1 stop10h 52m
United Airlines
Deal found 4/5$476
This United Airlines deal was found by Cheapflights users on 4/9. 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 4/247:37 pm
DEC
-
DEN
1 stop5h 22m
United Airlines
Mon 4/274:35 pm
DEN
-
DEC
1 stop24h 23m
United Airlines
Deal found 4/9$509
This United Airlines deal was found by Cheapflights users on 4/8. 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 4/237:37 pm
DEC
-
DEN
1 stop5h 22m
United Airlines
Mon 4/276:00 am
DEN
-
DEC
1 stop10h 57m
United Airlines
Deal found 4/8$519
This United Airlines deal was found by Cheapflights users on 4/6. 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 4/217:37 pm
DEC
-
DEN
1 stop21h 52m
United Airlines
Sat 4/258:52 pm
DEN
-
DEC
1 stop11h 06m
United Airlines
Deal found 4/6$544

Find 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 April 10, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$436
(United Airlines)
Provider with most accurate pricing for Decatur Arpt-Denver Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Decatur Arpt-Denver Intl flights.
Search Deals
From Decatur Arpt to Denver Intl
Search Deals

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 April 10, 2026.
Use the filters below to find and compare flights from Decatur to Denver that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 5/15

7:25 pm-11:50 pm

1 stop5h 25m

Denver Intl

Mon 5/18

9:20 pm-12:54 pm

1 stop14h 34m

$436

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Thu 7/30

7:20 pm-12:59 am

1 stop6h 39m

Denver Intl

Sun 8/2

6:00 am-5:56 pm

1 stop10h 56m

$448

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 5/8

7:25 pm-11:50 pm

1 stop5h 25m

Denver Intl

Sun 5/10

6:00 am-5:58 pm

1 stop10h 58m

$458

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Sat 6/6

7:05 pm-6:41 am

1 stop12h 36m

Denver Intl

Wed 6/10

9:05 pm-8:57 am

1 stop10h 52m

$476

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Thu 4/23

7:37 pm-11:59 pm

1 stop5h 22m

Denver Intl

Mon 4/27

6:00 am-5:57 pm

1 stop10h 57m

$519

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Tue 4/21

7:37 pm-4:29 pm

1 stop21h 52m

Denver Intl

Sat 4/25

8:52 pm-8:58 am

1 stop11h 06m

$544

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 7/17

7:20 pm-11:49 pm

1 stop5h 29m

Denver Intl

Mon 7/20

8:40 pm-6:11 pm

2 stops20h 31m

$569
Quickest round-trip

DecaturDenver

DEC - DEN

DECDEN

Decatur Arpt

Fri 4/24

7:37 pm-11:59 pm

1 stop5h 22m

Denver Intl

Sun 4/26

8:05 am-5:57 pm

2 stops8h 52m

$669

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/9

Sorted by cheapest first

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 April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Decatur, Illinois-Denver flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 $267). 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 25m. United Airlines provides one of the quickest options available for as low as $436. 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 $267). 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
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Greeley
Lone Tree
Wheat Ridge
Silverthorne
Central City
Cripple Creek
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