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$163+ Cheap flights from Duluth to Denver (DLH - 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 9/25. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — DEN
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Duluth Intl to Denver Intl are usually found in September or November, booked 50 days in advance, depart on a Sunday or Tuesday and return on a Monday

Cheap flight deals from Duluth to Denver

Discover tips and strategies to find the most affordable flight options for your journey from Duluth (DLH) 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 September 11, 2025.

Round-trip from

$268
(United Airlines)

One-way from

$163
(United Airlines)

Popular in

December

Cheapest in

September

Average price

$153
From Duluth Intl to Denver Intl
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One-way flight from Duluth Intl to Denver Intl
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Highest demand for flights based on searches. 6% potential increase in price ($23 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Duluth to Denver

Cheapest flights from Duluth to Denver
Explore the most affordable flight options available from Duluth to Denver. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 10/49:45 amDLH - DEN
1 stop5h 57mUnited Airlines
Sat 10/117:48 amDEN - DLH
1 stop5h 44mUnited Airlines
Deal found 9/9$268
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Sat 9/138:00 amDLH - DEN
1 stop5h 43mUnited Airlines
Sat 9/2011:18 amDEN - DLH
1 stop6h 12mUnited Airlines
Deal found 9/9$313
This Delta deal was found by Cheapflights users on 9/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/47:50 amDLH - DEN
1 stop5h 57mDelta
Sat 10/116:05 amDEN - DLH
1 stop4h 17mDelta
Deal found 9/10$318
This United Airlines deal was found by Cheapflights users on 9/10. 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 10/79:45 amDLH - DEN
1 stop7h 50mUnited Airlines
Tue 10/142:45 pmDEN - DLH
1 stop6h 23mUnited Airlines
Deal found 9/10$322
This United Airlines deal was found by Cheapflights users on 9/9. 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 9/123:10 pmDLH - DEN
1 stop7h 49mUnited Airlines
Mon 9/152:45 pmDEN - DLH
1 stop6h 20mUnited Airlines
Deal found 9/9$328
This United Airlines deal was found by Cheapflights users on 9/10. 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 9/299:45 amDLH - DEN
1 stop7h 18mUnited Airlines
Sat 10/117:48 amDEN - DLH
1 stop5h 44mUnited Airlines
Deal found 9/10$332
This United Airlines deal was found by Cheapflights users on 9/9. 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.
Wed 10/19:45 amDLH - DEN
1 stop7h 50mUnited Airlines
Tue 10/76:00 amDEN - DLH
1 stop11h 37mUnited Airlines
Deal found 9/9$367
This Delta deal was found by Cheapflights users on 9/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:50 amDLH - DEN
1 stop5h 51mDelta
Wed 11/124:18 pmDEN - DLH
1 stop6h 32mDelta
Deal found 9/11$371

Cheapflights Fare Finder

 
Customize your flight search to find flights from Duluth 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 September 11, 2025.
Use the filters below to find and compare flights from Duluth to Denver that are best for you.

Fly from

Duluth

Fly to

Denver

Route

Depart

Return

Price

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Sat 10/4

9:45 am-2:42 pm

1 stop5h 57m

Denver Intl

Sat 10/11

7:48 am-2:32 pm

1 stop5h 44m

$268

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Sat 10/4

7:50 am-12:47 pm

1 stop5h 57m

Denver Intl

Sat 10/11

6:05 am-11:22 am

1 stop4h 17m

$318

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Tue 10/7

9:45 am-4:35 pm

1 stop7h 50m

Denver Intl

Tue 10/14

2:45 pm-10:08 pm

1 stop6h 23m

$322

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Fri 11/7

7:50 am-12:41 pm

1 stop5h 51m

Denver Intl

Wed 11/12

4:18 pm-11:50 pm

1 stop6h 32m

$371

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Fri 10/3

3:07 pm-8:19 pm

1 stop6h 12m

Denver Intl

Sun 10/5

6:00 am-10:08 pm

1 stop15h 08m

$386

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Wed 10/1

3:07 pm-10:00 pm

1 stop7h 53m

Denver Intl

Tue 10/7

8:00 am-10:08 pm

2 stops13h 08m

$392

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Thu 12/18

7:50 am-2:43 pm

1 stop7h 53m

Denver Intl

Sat 1/10

3:15 pm-9:59 pm

1 stop5h 44m

$412

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Wed 9/24

11:20 am-4:35 pm

1 stop6h 15m

Denver Intl

Sun 9/28

6:00 am-2:32 pm

1 stop7h 32m

$412

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Sun 10/26

7:50 am-12:39 pm

1 stop5h 49m

$163

DuluthDenver

DLH - DEN

DLHDEN

Duluth Intl

Thu 9/25

9:45 am-4:35 pm

1 stop7h 50m

$163

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 16 results
1
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Best time to book a flight from Duluth to Denver

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

How far ahead should I book a flight from Duluth to Denver?

Use this chart to determine the optimal time to book a round-trip flight from Duluth to Denver. Price data was last updated on August 29, 2025.

The best time to book flights from Duluth to Denver is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Duluth to Denver?

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

Reviews of airlines servicing Denver

Get insights into the airlines that provide service to Denver. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Denver. Reviews last updated September 11, 2025.
Read through reviews of airlines operating flights from Duluth to Denver, such as Delta, United Airlines, and Sun Country Air. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Sun Country Air
6.9
Okay
330 reviews
Delta
8.0
Very good
7,960 reviews

Crew

8.5

Boarding

8.2

Entertainment

7.9

Overall

8.0

Food

7.3

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Duluth 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 Duluth to Denver?

    A quick flight from Duluth to Denver can take about 5h 57m. United Airlines provides one of the quickest options available for as low as $268. There are 789 mi between Duluth and Denver.

  • What are the cheapest airlines flying from Duluth to Denver round-trip?

    Sun Country Air, at $69, was found to be the cheapest airline from Duluth to Denver.Alternate airlines to your destination round-trip include Delta and United Airlines. Sun Country Air is priced at 80% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

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

    Currently, October is the cheapest month in which you can book a flight from Duluth to Denver (average of $197). Flying from Duluth 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
Broomfield
Greeley
Lone Tree
Lakewood
Cripple Creek
Thornton
Silverthorne
Frisco
Manitou Springs
Fort Morgan
Glendale
Wheat Ridge
Brighton
Longmont
Idaho Springs
Parker

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Duluth to Denver

See prices for flight routes from nearby airports that may be better suited for you.
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Top 3 airlines flying from Duluth to Denver

Discover the top 3 airlines that operate flights from Duluth to Denver. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$69Average$191FlexibilityNo cancel feeOn-time83%
DeltaCheapest$153Average$337FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$240Average$493FlexibilityNo cancel feeOn-time69%

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