HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Decatur

$365+ Cheap flights from Denver to Decatur, IL (DEN - DEC)

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 5/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — DEC
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Denver to Decatur with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Denver to Decatur

Cheapest flights from Denver to Decatur
Explore the most affordable flight options available from Denver to Decatur. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This United Airlines deal was found by Cheapflights users on 1/20. 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.
Sat 5/27:20 pm
DEN
-
DEC
1 stop12h 38m
United Airlines
Wed 5/67:20 pm
DEC
-
DEN
1 stop5h 10m
United Airlines
Deal found 1/20$365
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Wed 2/44:15 pm
DEN
-
DEC
1 stop24h 46m
United Airlines
Sun 2/89:49 am
DEC
-
DEN
1 stop7h 03m
United Airlines
Deal found 1/20$416
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Tue 1/279:40 am
DEN
-
DEC
1 stop7h 21m
United Airlines
Thu 1/297:09 pm
DEC
-
DEN
2 stops36h 56m
United Airlines
Deal found 1/20$705
This United Airlines deal was found by Cheapflights users on 1/20. 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 1/2511:20 am
DEN
-
DEC
1 stop5h 41m
United Airlines
Tue 1/277:09 pm
DEC
-
DEN
1 stop20h 42m
United Airlines
Deal found 1/20$912

Find flight deals from Denver to Decatur

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Decatur (DEC). 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 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

Expedia
3 stars

Round-trip from

$365
(United Airlines)
Provider with most accurate pricing for Denver Intl-Decatur Arpt flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Decatur Arpt flights.
Search Deals
From Denver Intl to Decatur Arpt
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Decatur 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 21, 2026.
Use the filters below to find and compare flights from Denver to Decatur that are best for you.

Fly from

Denver

Fly to

Decatur

Route

Depart

Return

Price

DenverDecatur

DEN - DEC

DENDEC

Denver Intl

Wed 2/4

4:15 pm-6:01 pm

1 stop24h 46m

Decatur Arpt

Sun 2/8

9:49 am-3:52 pm

1 stop7h 03m

$416

DenverDecatur

DEN - DEC

DENDEC

Denver Intl

Tue 1/27

9:40 am-6:01 pm

1 stop7h 21m

Decatur Arpt

Thu 1/29

7:09 pm-7:05 am

2 stops36h 56m

$705

DenverDecatur

DEN - DEC

DENDEC

Denver Intl

Sun 1/25

9:40 am-6:01 pm

1 stop7h 21m

Decatur Arpt

Tue 1/27

7:09 pm-2:51 pm

1 stop20h 42m

$962

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Compare providers for flights from Denver to Decatur

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 Denver to Decatur in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
ExpediaPrice Accuracy2 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 Denver-Decatur, Illinois flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Decatur, Illinois flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Decatur, Illinois flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Decatur, Illinois flights, Cheapflights users trust Expedia the most. Expedia 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 Denver-Decatur, Illinois 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 Denver to Decatur

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

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

Currently, July is the cheapest month in which you can book a flight from Denver to Decatur, Illinois (average of $46). Flying from Denver to Decatur, Illinois in December is currently the most expensive (average of $193). 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 Denver to Decatur. 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 Denver to Decatur, Illinois?

    Airlines like United Airlines fly from Denver to Decatur, Illinois in about 24h 46m. The time it takes to get you to your destination can typically vary by up to . The distance from Denver to Decatur, Illinois is about 837 mi.

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

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

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

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

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

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

    Currently, July is the cheapest month in which you can book a flight from Denver to Decatur, Illinois (average of $46). Flying from Denver to Decatur, Illinois in December is currently the most expensive (average of $193). 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 Decatur?

Book flights to Decatur if you plan to visit one of these locations
Mattoon
Effingham

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Denver to Decatur

See prices for flight routes from nearby airports that may be better suited for you.
Denver to O'Hare Intl flights
Denver to Midway flights
Denver to St. Louis flights
Colorado Springs to O'Hare Intl flights
Denver to Moline flights
Denver to Peoria flights
Colorado Springs to Midway flights
Vail to O'Hare Intl flights
Grand Junction to O'Hare Intl flights
Montrose to O'Hare Intl flights
Colorado Springs to St. Louis flights
Aspen to O'Hare Intl flights
Denver to Rockford flights
Durango to O'Hare Intl flights
Gunnison to O'Hare Intl flights
Vail to Midway flights
Hayden to O'Hare Intl flights
Aspen to Midway flights
Denver to Bloomington flights
Grand Junction to Midway flights
Colorado Springs to Peoria flights
Montrose to St. Louis flights
Durango to St. Louis flights
Durango to Moline flights
Colorado Springs to Moline flights
Denver to Springfield flights
Montrose to Peoria flights
Montrose to Midway flights
Denver to Evansville flights
Gunnison to St. Louis flights
Colorado Springs to Springfield flights
Aspen to St. Louis flights
Hayden to St. Louis flights
Grand Junction to St. Louis flights
Grand Junction to Bloomington flights
Grand Junction to Peoria flights
Hayden to Moline flights
Vail to St. Louis flights
Denver to Champaign flights
Colorado Springs to Evansville flights
Colorado Springs to Bloomington flights
Denver to Dubuque flights
Colorado Springs to Champaign flights
Montrose to Springfield flights
Durango to Midway flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.