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Duluth

$159+ Cheap flights from Colorado to Duluth (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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — DLH
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Colorado to Duluth

Cheapest flights from Colorado to Duluth
Explore the most affordable flight options available from Colorado to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This United Airlines deal was found by Cheapflights users on 12/9. 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 12/204:26 pmDEN - DLH
1 stop5h 29mUnited Airlines
Thu 12/253:03 pmDLH - DEN
1 stop5h 43mUnited Airlines
Deal found 12/9$664
This Delta deal was found by Cheapflights users on 12/10. 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.
Wed 12/314:14 pmDEN - DLH
1 stop5h 38mDelta
Sat 1/311:55 amDLH - DEN
1 stop5h 49mDelta
Deal found 12/10$713
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Thu 12/256:00 amDEN - DLH
1 stop7h 28mUnited Airlines
Mon 12/293:03 pmDLH - DEN
2 stops20h 04mUnited Airlines
Deal found 12/10$744
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/316:00 amDEN - DLH
1 stop15h 55mUnited Airlines
Sat 1/37:50 amDLH - DEN
2 stops27h 21mUnited Airlines
Deal found 12/10$779
This Delta deal was found by Cheapflights users on 12/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/195:45 amDEN - DLH
1 stop4h 35mDelta
Fri 12/264:10 pmDLH - DEN
1 stop4h 58mDelta
Deal found 12/9$888
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Sun 12/214:26 pmDEN - DLH
1 stop5h 29mUnited Airlines
Mon 12/293:03 pmDLH - DEN
2 stops20h 04mUnited Airlines
Deal found 12/11$901
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Sun 12/217:00 amCOS - DLH
2 stops14h 55mUnited Airlines
Wed 12/243:03 pmDLH - COS
2 stops20h 49mUnited Airlines
Deal found 12/10$1,124

Find flight deals from Colorado to Duluth

Keep the following information in mind while searching for Colorado to Duluth flight deals. Data was last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$258
(Delta)

Popular in

September

Cheapest in

December

Average price

$264
Provider with most accurate pricing for Denver Intl-Duluth Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-Duluth Intl flights.
Search Deals
From Colorado to Duluth Intl
Search Deals
Highest demand for flights based on searches. 7% potential increase in price ($28 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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 December 12, 2025.
Use the filters below to find and compare flights from Colorado to Duluth that are best for you.

Fly from

Colorado

Fly to

Duluth

Route

Depart

Return

Price

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 1/30

5:49 pm-11:52 pm

1 stop5h 03m

Duluth Intl

Sat 1/31

11:56 am-4:43 pm

1 stop5h 47m

$258

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 1/30

5:49 pm-11:52 pm

1 stop5h 03m

Duluth Intl

Mon 2/2

11:51 am-4:41 pm

1 stop5h 50m

$258

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 1/31

11:17 am-7:35 pm

1 stop7h 18m

Duluth Intl

Mon 2/2

11:51 am-4:41 pm

1 stop5h 50m

$297

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 1/29

2:42 pm-3:44 pm

1 stop24h 02m

Duluth Intl

Mon 2/2

11:51 am-4:41 pm

1 stop5h 50m

$342

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 1/30

5:49 pm-11:52 pm

1 stop5h 03m

Duluth Intl

Sun 2/1

11:51 am-1:55 pm

1 stop27h 04m

$376

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 1/17

6:00 am-2:30 pm

1 stop7h 30m

Duluth Intl

Wed 1/21

3:05 pm-8:13 pm

1 stop6h 08m

$456

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 1/13

6:00 am-2:30 pm

1 stop7h 30m

Duluth Intl

Sun 1/18

3:05 pm-10:00 pm

1 stop7h 55m

$506

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 1/29

11:17 am-11:52 pm

1 stop11h 35m

Duluth Intl

Sun 2/1

5:00 am-2:00 pm

1 stop10h 00m

$509

Colorado SpringsDuluth

COS - DLH

COSDLH

Colorado Springs

Wed 1/21

10:33 am-9:59 pm

2 stops10h 26m

Duluth Intl

Sat 1/24

3:05 pm-11:02 am

1 stop20h 57m

$648

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 4/25

6:10 am-10:57 am

1 stop3h 47m

$159

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 13 results
1
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Best time to book a flight from Colorado to Duluth

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

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

Currently, February is the cheapest month in which you can book a flight from Colorado to Duluth (average of $66). Flying from Colorado to Duluth in October is currently the most expensive (average of $251). 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 CO to DLH?

Find hourly flight availability from Colorado 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 December 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Colorado to Duluth in the evening. If you’re flexible enough to do this you can expect to save up to 69% on your trip compared to booking a flight in the morning.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Duluth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Duluth from Colorado?

    Most people fly into Duluth Intl (DLH) if they book a flight to Duluth from Colorado. Duluth Intl is conveniently located just 5.8 mi from Duluth’s city center.

  • How long is the flight from Colorado to Duluth?

    A quick flight from Colorado to Duluth can take about 5h 03m. Delta provides one of the quickest options available for as low as $258. Colorado and Duluth are separated by a distance of 789 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

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

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

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

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

    Currently, February is the cheapest month in which you can book a flight from Colorado to Duluth (average of $66). Flying from Colorado to Duluth in October is currently the most expensive (average of $251). 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 Colorado to Duluth

Discover the top 3 airlines that operate flights from Colorado 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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$68Average$216FlexibilityNo cancel feeOn-time83%
DeltaCheapest$238Average$377FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$298Average$582FlexibilityNo cancel feeOn-time69%

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