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$123+ Cheap flights from Denver to Duluth (DEN - DLH)

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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — DLH
Oct 25 — Nov 11
Sat 10/25
Sat 11/1
1 adult, Economy
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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”

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Cheapflights Tip: The best prices from Denver Intl to Duluth Intl are usually found in August or November, booked 62 days in advance, depart on a Monday or Wednesday and return on a Sunday

Cheap flight deals from Denver to Duluth

Discover tips and strategies to find the most affordable flight options for your journey from Denver (DEN) to Duluth (DLH). 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 25, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$238
(Delta)

One-way from

$123
(Delta)

Popular in

March

Cheapest in

August

Average price

$333
Provider with most accurate pricing for Denver Intl-Duluth Intl flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-Duluth Intl flights.
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From Denver Intl to Duluth Intl
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One-way flight from Denver Intl to Duluth Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 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 Denver to Duluth

Cheapest flights from Denver to Duluth
Explore the most affordable flight options available from Denver to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 25, 2025.

This Delta deal was found by Cheapflights users on 9/23. 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.
Mon 11/106:59 pmDEN - DLH
1 stop3h 51mDelta
Tue 11/184:18 pmDLH - DEN
1 stop4h 13mDelta
Deal found 9/23$238
This Delta deal was found by Cheapflights users on 9/23. 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.
Thu 11/136:59 pmDEN - DLH
1 stop3h 51mDelta
Thu 11/204:18 pmDLH - DEN
1 stop4h 13mDelta
Deal found 9/23$252
This Delta deal was found by Cheapflights users on 9/24. 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.
Tue 11/185:45 amDEN - DLH
1 stop4h 36mDelta
Sat 11/2212:01 pmDLH - DEN
1 stop4h 26mDelta
Deal found 9/24$263
This Delta deal was found by Cheapflights users on 9/23. 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.
Tue 12/26:00 amDEN - DLH
1 stop4h 20mDelta
Mon 12/812:01 pmDLH - DEN
1 stop4h 38mDelta
Deal found 9/23$266
This Delta deal was found by Cheapflights users on 9/23. 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 11/146:59 pmDEN - DLH
1 stop3h 51mDelta
Thu 11/204:18 pmDLH - DEN
1 stop4h 13mDelta
Deal found 9/23$273
This Delta deal was found by Cheapflights users on 9/23. 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.
Mon 11/106:59 pmDEN - DLH
1 stop3h 51mDelta
Mon 11/174:18 pmDLH - DEN
1 stop4h 13mDelta
Deal found 9/23$283
This Delta deal was found by Cheapflights users on 9/23. 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.
Thu 11/136:59 pmDEN - DLH
1 stop3h 51mDelta
Sat 11/2212:01 pmDLH - DEN
1 stop4h 26mDelta
Deal found 9/23$287
This Delta deal was found by Cheapflights users on 9/24. 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.
Tue 11/187:05 amDEN - DLH
2 stops15h 45mDelta
Sun 11/2312:01 pmDLH - DEN
1 stop4h 38mDelta
Deal found 9/24$292
This Delta deal was found by Cheapflights users on 9/23. 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.
Thu 12/116:59 pmDEN - DLH
1 stop4h 00mDelta
Wed 12/1712:01 pmDLH - DEN
1 stop4h 38mDelta
Deal found 9/23$297
This Delta deal was found by Cheapflights users on 9/23. 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 11/146:59 pmDEN - DLH
1 stop3h 51mDelta
Sat 11/2212:01 pmDLH - DEN
1 stop4h 26mDelta
Deal found 9/23$308
This Delta deal was found by Cheapflights users on 9/23. 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.
Mon 12/16:59 pmDEN - DLH
1 stop3h 51mDelta
Wed 12/1012:01 pmDLH - DEN
1 stop4h 38mDelta
Deal found 9/23$317
This Delta deal was found by Cheapflights users on 9/23. 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.
Wed 11/265:45 amDEN - DLH
1 stop4h 36mDelta
Thu 12/412:01 pmDLH - DEN
1 stop4h 38mDelta
Deal found 9/23$318

Cheapflights Fare Finder

 
Customize your flight search to find flights from Denver to Duluth 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 25, 2025.
Use the filters below to find and compare flights from Denver to Duluth that are best for you.

Fly from

Denver

Fly to

Duluth

Route

Depart

Return

Price

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 11/11

4:18 pm-11:50 pm

1 stop6h 32m

Duluth Intl

Wed 11/19

12:01 pm-3:39 pm

1 stop4h 38m

$238

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 12/6

6:00 am-11:20 am

1 stop4h 20m

Duluth Intl

Mon 12/15

12:01 pm-3:39 pm

1 stop4h 38m

$238

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 11/11

6:59 pm-11:50 pm

1 stop3h 51m

Duluth Intl

Thu 11/20

4:18 pm-7:31 pm

1 stop4h 13m

$238

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Mon 11/10

6:59 pm-11:50 pm

1 stop3h 51m

Duluth Intl

Sun 11/16

5:10 am-10:03 am

1 stop5h 53m

$238

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 11/4

6:05 am-11:22 am

1 stop4h 17m

Duluth Intl

Tue 11/18

12:01 pm-3:39 pm

1 stop4h 38m

$238

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Mon 11/24

6:59 pm-11:50 pm

1 stop3h 51m

Duluth Intl

Wed 12/3

12:01 pm-3:39 pm

1 stop4h 38m

$252

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 11/13

6:59 pm-11:50 pm

1 stop3h 51m

Duluth Intl

Wed 11/19

4:18 pm-7:31 pm

1 stop4h 13m

$252

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Mon 11/17

6:59 pm-11:50 pm

1 stop3h 51m

Duluth Intl

Sun 11/23

12:01 pm-3:39 pm

1 stop4h 38m

$252

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 12/2

6:00 am-11:20 am

1 stop4h 20m

Duluth Intl

Mon 12/8

12:01 pm-3:39 pm

1 stop4h 38m

$266

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 11/27

5:45 am-11:21 am

1 stop4h 36m

Duluth Intl

Fri 12/5

12:01 pm-3:39 pm

1 stop4h 38m

$273

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/23

Showing 1-10 of 17 results
1
2

Compare providers for flights from Denver to Duluth

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 Duluth in September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 Denver-Duluth flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Denver-Duluth flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Denver-Duluth flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Denver-Duluth 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 Denver-Duluth 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 Duluth

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

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

Use this chart to determine the optimal time to book a round-trip flight from Denver to Duluth. Price data was last updated on September 19, 2025.

Booking 61 days in advance of your planned departure date is, on average, the best time to get cheap flights from Denver to Duluth. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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

Currently, January is the cheapest month in which you can book a flight from Denver to Duluth (average of $339). Flying from Denver to Duluth in June is currently the most expensive (average of $475). 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.

What is the cheapest time of day to fly from DEN to DLH?

Find hourly flight availability from Denver to Duluth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 25, 2025.

One of the essential ways to save on airfare from Denver to Duluth is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 27% on airfare.

Reviews of airlines servicing Duluth

Get insights into the airlines that provide service to Duluth. 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 Duluth. Reviews last updated September 25, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and Sun Country Air from Denver to Duluth. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,973 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Marie Antonette,Sep 2023

CDG - MSP

The actual flight out of MSP was great. However, it was delayed by an hour and we didn’t have anyone at our gate to provide any information until boarding.
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Marie Antonette,Sep 2023

CDG - MSP

The actual flight out of MSP was great. However, it was delayed by an hour and we didn’t have anyone at our gate to provide any information until boarding.
United Airlines
7.4
Good
8,926 reviews
Delta
8.0
Very good
7,973 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Marie Antonette,Sep 2023

CDG - MSP

The actual flight out of MSP was great. However, it was delayed by an hour and we didn’t have anyone at our gate to provide any information until boarding.
Sun Country Air
6.9
Okay
333 reviews
Delta
8.0
Very good
7,973 reviews

Boarding

8.2

Comfort

7.9

Food

7.3

Overall

8.0

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
8.0
Excellent

Marie Antonette,Sep 2023

CDG - MSP

The actual flight out of MSP was great. However, it was delayed by an hour and we didn’t have anyone at our gate to provide any information until boarding.

Related info for your journey

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

    There are many flights that can get you from Denver to Duluth in 6h 32m. Fly via Delta to get the fastest option. Airlines will cover a distance of 789 mi.

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

    Flying on Sun Country Air is currently your cheapest option to Duluth, with prices starting at $68. Additional round-trip tickets that might be worth considering are offered by Delta and United Airlines, with the lowest prices starting at $221 and $298, respectively. Sun Country Air is currently priced 80% below the average price you’ll pay for this route.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Denver to Duluth (average of $339). Flying from Denver to Duluth in June is currently the most expensive (average of $475). 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 Duluth?

Book flights to Duluth if you plan to visit one of these locations
Two Harbors
Superior

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Alternative routes for Denver to Duluth

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Top 3 airlines flying from Denver to Duluth

Discover the top 3 airlines that operate flights from Denver to Duluth. 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 25, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$68Average$176FlexibilityNo cancel feeOn-time83%
DeltaCheapest$221Average$365FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$298Average$423FlexibilityNo cancel feeOn-time69%

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