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Duluth

$227+ 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 8/21. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — DLH
Aug 25 — Sep 11
Tue 8/25
Tue 9/1
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 July 26, 2026.

This United Airlines deal was found by Cheapflights users on 7/21. 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 8/292:50 pm
DEN
-
DLH
1 stop7h 32m
United Airlines
Sat 9/56:23 pm
DLH
-
DEN
1 stop6h 31m
United Airlines
Deal found 7/21$308
This Delta deal was found by Cheapflights users on 7/22. 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 8/2511:27 am
COS
-
DLH
1 stop7h 17m
Delta
Sat 8/295:15 am
DLH
-
COS
1 stop6h 32m
Delta
Deal found 7/22$308
This Delta deal was found by Cheapflights users on 7/21. 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 8/286:00 am
DEN
-
DLH
1 stop4h 01m
Delta
Sun 9/611:41 am
DLH
-
DEN
1 stop4h 42m
Delta
Deal found 7/21$322
This Delta deal was found by Cheapflights users on 7/24. 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 9/295:45 pm
DEN
-
DLH
1 stop3h 50m
Delta
Sun 10/48:10 am
DLH
-
DEN
1 stop4h 58m
Delta
Deal found 7/24$332
This United Airlines deal was found by Cheapflights users on 7/23. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/114:40 pm
DEN
-
DLH
1 stop5h 30m
United Airlines
Fri 9/186:24 pm
DLH
-
DEN
1 stop6h 05m
United Airlines
Deal found 7/23$336
This Delta deal was found by Cheapflights users on 7/21. 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 8/266:00 am
DEN
-
DLH
1 stop12h 44m
Delta
Sat 9/54:11 pm
DLH
-
DEN
1 stop4h 40m
Delta
Deal found 7/21$350
This Delta deal was found by Cheapflights users on 7/21. 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 8/266:05 am
DEN
-
DLH
2 stops12h 39m
Delta
Sun 9/64:11 pm
DLH
-
DEN
1 stop4h 40m
Delta
Deal found 7/21$356
This Delta deal was found by Cheapflights users on 7/23. 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 9/308:45 am
DEN
-
DLH
1 stop5h 44m
Delta
Thu 10/84:21 pm
DLH
-
DEN
1 stop4h 20m
Delta
Deal found 7/23$365
This Delta deal was found by Cheapflights users on 7/22. 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 8/2611:27 am
COS
-
DLH
1 stop7h 17m
Delta
Sat 8/295:15 am
DLH
-
COS
1 stop6h 32m
Delta
Deal found 7/22$372
This Delta deal was found by Cheapflights users on 7/24. 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.
Fri 9/116:15 am
DEN
-
DLH
1 stop3h 48m
Delta
Fri 9/184:11 pm
DLH
-
DEN
1 stop4h 54m
Delta
Deal found 7/24$375
This Delta deal was found by Cheapflights users on 7/21. 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 8/266:00 am
DEN
-
DLH
1 stop12h 44m
Delta
Tue 9/811:43 am
DLH
-
DEN
1 stop12h 52m
Delta
Deal found 7/21$378
This United Airlines deal was found by Cheapflights users on 7/21. 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 11/144:45 pm
DEN
-
DLH
1 stop5h 19m
United Airlines
Tue 11/177:35 am
DLH
-
DEN
1 stop7h 48m
United Airlines
Deal found 7/21$388

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 July 26, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$308
(United Airlines)

One-way from

$227
(Delta)

Popular in

August

Cheapest in

December

Average price

$528
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
One-way flight from Colorado to Duluth Intl
Search Deals
Highest demand for flights based on searches. 12% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 July 26, 2026.
Use the filters below to find and compare flights from Colorado to Duluth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Wed 9/30

3:47 pm-11:22 pm

1 stop6h 35m

Duluth Intl

Sat 10/10

3:10 pm-9:44 pm

1 stop7h 34m

$308

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 9/12

6:15 am-11:03 am

1 stop3h 48m

Duluth Intl

Tue 9/15

4:11 pm-8:05 pm

1 stop4h 54m

$322

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Wed 9/16

6:15 am-11:03 am

1 stop3h 48m

Duluth Intl

Mon 9/21

4:11 pm-8:05 pm

1 stop4h 54m

$322

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 9/29

5:45 pm-10:35 pm

1 stop3h 50m

Duluth Intl

Sun 10/4

8:10 am-12:08 pm

1 stop4h 58m

$332
Quickest round-trip

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Wed 9/30

6:15 am-11:03 am

1 stop3h 48m

Duluth Intl

Wed 10/7

4:21 pm-8:10 pm

1 stop4h 49m

$365

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 9/3

6:00 am-11:01 am

1 stop4h 01m

Duluth Intl

Mon 9/7

8:05 am-12:08 pm

1 stop5h 03m

$404

Colorado SpringsDuluth

COS - DLH

COSDLH

Colorado Springs

Sat 8/22

1:20 pm-7:44 pm

2 stops29h 24m

Duluth Intl

Sat 8/29

5:15 am-10:47 am

1 stop6h 32m

$408

Colorado SpringsDuluth

COS - DLH

COSDLH

Colorado Springs

Thu 8/27

6:16 pm-11:01 am

2 stops15h 45m

Duluth Intl

Mon 8/31

4:11 pm-5:36 pm

2 stops26h 25m

$507

Colorado SpringsDuluth

COS - DLH

COSDLH

Colorado Springs

Mon 8/24

11:27 am-11:01 am

1 stop22h 34m

Duluth Intl

Mon 8/31

4:11 pm-5:36 pm

2 stops26h 25m

$542

Colorado SpringsDuluth

COS - DLH

COSDLH

Colorado Springs

Tue 8/25

11:27 am-7:44 pm

1 stop7h 17m

Duluth Intl

Thu 8/27

4:11 pm-12:15 pm

2 stops21h 04m

$605

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/26

Showing 1-10 of 17 resultsSorted by cheapest first
1
2

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

How much does it cost to fly round-trip from Colorado to Duluth?

Airfare is below average for this route at the moment.
Colorado to Duluth flights typically cost between $402 and $584 in August.
The cheapest round-trip price found within the last 5 days was $308 on United Airlines (Aug 29-Sep 5).

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 3h 48m. United Airlines provides one of the quickest options available for as low as $322. 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.

See more FAQs

Traveling to a place near Duluth?

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

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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 July 26, 2026.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$68Average$141FlexibilityNo cancel feeOn-time83%
DeltaCheapest$173Average$484FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$218Average$459FlexibilityNo cancel feeOn-time69%

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