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$214+ 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 8/30. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — DLH
ago. 19 — ago. 261
mar. 8/19
mar. 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Denver Intl to Duluth Intl are usually found in August or September, 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 agosto 14, 2025.

Round-trip from

$279
(Delta)

One-way from

$214
(Delta)

Popular in

March

Cheapest in

August

Average price

$267
From Denver Intl to Duluth Intl
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One-way flight from Denver Intl to Duluth Intl
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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 August 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 agosto 14, 2025.

This Delta deal was found by Cheapflights users on 8/12. 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.
sáb. 10/114:16 pmDEN - DLH
1 stop5h 37mDelta
sáb. 10/1812:02 pmDLH - DEN
1 stop4h 40mDelta
Deal found 8/12$258
This Delta deal was found by Cheapflights users on 8/12. 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.
mié. 11/56:05 amDEN - DLH
1 stop4h 17mDelta
vie. 11/712:02 pmDLH - DEN
1 stop4h 40mDelta
Deal found 8/12$279
This Delta deal was found by Cheapflights users on 8/11. 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.
sáb. 9/131:50 pmDEN - DLH
1 stop4h 23mDelta
sáb. 9/204:19 pmDLH - DEN
1 stop4h 35mDelta
Deal found 8/11$288
This United Airlines deal was found by Cheapflights users on 8/13. 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.
jue. 9/116:00 amDEN - DLH
1 stop7h 35mUnited Airlines
lun. 9/153:10 pmDLH - DEN
1 stop7h 49mUnited Airlines
Deal found 8/13$298
This Delta deal was found by Cheapflights users on 8/12. 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.
mar. 9/24:00 pmDEN - DLH
1 stop5h 46mDelta
sáb. 9/64:19 pmDLH - DEN
1 stop4h 36mDelta
Deal found 8/12$318
This Delta deal was found by Cheapflights users on 8/11. 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.
jue. 10/236:55 pmDEN - DLH
1 stop3h 47mDelta
dom. 10/2612:02 pmDLH - DEN
1 stop4h 40mDelta
Deal found 8/11$348
This United Airlines deal was found by Cheapflights users on 8/12. 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.
sáb. 10/187:48 amDEN - DLH
1 stop5h 44mUnited Airlines
sáb. 10/253:07 pmDLH - DEN
1 stop6h 12mUnited Airlines
Deal found 8/12$382
This United Airlines deal was found by Cheapflights users on 8/12. 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.
mar. 9/27:50 amDEN - DLH
2 stops13h 15mUnited Airlines
sáb. 9/63:10 pmDLH - DEN
1 stop6h 02mUnited Airlines
Deal found 8/12$392
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 9/135:48 pmDEN - DLH
2 stops15h 57mUnited Airlines
sáb. 9/203:10 pmDLH - DEN
1 stop6h 02mUnited Airlines
Deal found 8/11$400

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 agosto 14, 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

jue. 10/23

6:05 am-11:22 am

1 stop4h 17m

Duluth Intl

sáb. 10/25

12:02 pm-3:42 pm

1 stop4h 40m

$258

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

sáb. 10/11

4:16 pm-10:53 pm

1 stop5h 37m

Duluth Intl

sáb. 10/18

12:02 pm-3:42 pm

1 stop4h 40m

$258

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

mié. 11/5

6:05 am-11:22 am

1 stop4h 17m

Duluth Intl

vie. 11/7

12:02 pm-3:42 pm

1 stop4h 40m

$279

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

sáb. 9/13

1:50 pm-7:13 pm

1 stop4h 23m

Duluth Intl

sáb. 9/20

4:19 pm-7:54 pm

1 stop4h 35m

$288

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

jue. 9/11

6:00 am-2:35 pm

1 stop7h 35m

Duluth Intl

lun. 9/15

3:10 pm-9:59 pm

1 stop7h 49m

$298

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

sáb. 10/18

6:05 am-11:22 am

1 stop4h 17m

Duluth Intl

mié. 10/22

5:18 am-10:00 am

1 stop5h 42m

$318

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

sáb. 9/27

4:00 pm-10:43 pm

1 stop5h 43m

Duluth Intl

sáb. 10/4

7:50 am-12:47 pm

1 stop5h 57m

$318

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

vie. 10/24

6:55 pm-11:42 pm

1 stop3h 47m

Duluth Intl

dom. 10/26

7:50 am-12:39 pm

1 stop5h 49m

$318

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

mar. 9/2

4:00 pm-10:46 pm

1 stop5h 46m

Duluth Intl

sáb. 9/6

4:19 pm-7:55 pm

1 stop4h 36m

$318

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

jue. 10/23

6:05 am-11:22 am

1 stop4h 17m

Duluth Intl

dom. 10/26

7:50 am-12:39 pm

1 stop5h 49m

$318

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/14

Showing 1-10 of 17 results
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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 August 8, 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 $336). Flying from Denver to Duluth in June is currently the most expensive (average of $476). 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 agosto 14, 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 agosto 14, 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
7,980 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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
7,980 reviews

Entertainment

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Comfort

7.9

Crew

8.5

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.

  • 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 $336). Flying from Denver to Duluth in June is currently the most expensive (average of $476). 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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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 agosto 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$68Average$176FlexibilityNo cancel feeOn-time83%
DeltaCheapest$221Average$349FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$298Average$403FlexibilityNo cancel feeOn-time69%

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