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Cheap flights from Colorado to Duluth from $178

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Colorado to Duluth departing on 9/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Colorado to Duluth

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:50 pm - 11:22 pm
DEN
-
DLH
6h 32m
1 stop
United Airlines Logo
6:23 pm - 11:53 pm
DLH
-
DEN
6h 30m
1 stop
$298United Airlines
Fri, Aug 14 - Wed, Aug 19
United Airlines Logo
3:50 pm - 11:22 pm
DEN
-
DLH
6h 32m
1 stop
United Airlines Logo
6:23 pm - 11:53 pm
DLH
-
DEN
6h 30m
1 stop
$309United Airlines
Sat, Aug 15 - Wed, Aug 19
Delta Logo
5:45 pm - 10:35 pm
DEN
-
DLH
3h 50m
1 stop
Delta Logo
4:15 pm - 8:00 pm
DLH
-
DEN
4h 45m
1 stop
$314Delta
Wed, Sep 30 - Wed, Oct 7
Delta Logo
9:19 am - 3:42 pm
DEN
-
DLH
5h 23m
1 stop
Delta Logo
5:00 am - 8:06 am
DLH
-
DEN
4h 06m
1 stop
$373Delta
Fri, Jul 17 - Wed, Jul 22
United Airlines Logo
3:50 pm - 11:22 pm
DEN
-
DLH
6h 32m
1 stop
United Airlines Logo
7:45 am - 12:45 pm
DLH
-
DEN
6h 00m
1 stop
$378United Airlines
Fri, Aug 28 - Sat, Aug 29
United Airlines Logo
3:50 pm - 11:22 pm
DEN
-
DLH
6h 32m
1 stop
United Airlines Logo
7:45 am - 2:31 pm
DLH
-
DEN
7h 46m
1 stop
$393United Airlines
Sat, Aug 15 - Sat, Aug 22
United Airlines Logo
3:50 pm - 11:22 pm
DEN
-
DLH
6h 32m
1 stop
United Airlines Logo
6:23 pm - 11:53 pm
DLH
-
DEN
6h 30m
1 stop
$403United Airlines
Fri, Aug 14 - Sun, Aug 23
Delta Logo
6:00 am - 11:04 am
DEN
-
DLH
4h 04m
1 stop
Delta Logo
5:00 am - 8:06 am
DLH
-
DEN
4h 06m
1 stop
$407Delta
Fri, Jul 24 - Tue, Jul 28
Delta Logo
9:19 am - 3:42 pm
DEN
-
DLH
5h 23m
1 stop
Delta Logo
8:00 am - 12:05 pm
DLH
-
DEN
5h 05m
1 stop
$418Delta
Fri, Jul 17 - Sun, Jul 19
Delta Logo
6:00 am - 7:25 pm
DEN
-
DLH
12h 25m
1 stop
Delta Logo
5:00 am - 8:06 am
DLH
-
DEN
4h 06m
1 stop
$421Delta
Thu, Jul 16 - Wed, Jul 22

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United Airlines flights from Colorado to Duluth

Our best United Airlines deals on Colorado to Duluth flight tickets
United Airlines
Aug 14
DEN3:50 pmDenver Intl
6h 32m
1 stop
DLH11:22 pmDuluth Intl
Aug 19
DLH6:23 pmDuluth Intl
6h 30m
1 stop
DEN11:53 pmDenver Intl
$298
United Airlines
Aug 15
DEN3:50 pmDenver Intl
6h 32m
1 stop
DLH11:22 pmDuluth Intl
Aug 19
DLH6:23 pmDuluth Intl
6h 30m
1 stop
DEN11:53 pmDenver Intl
$309
United Airlines
Aug 28
DEN3:50 pmDenver Intl
6h 32m
1 stop
DLH11:22 pmDuluth Intl
Aug 29
DLH7:45 amDuluth Intl
6h 00m
1 stop
DEN12:45 pmDenver Intl
$378

Delta flights from Colorado to Duluth

Our best Delta deals on Colorado to Duluth flight tickets
Delta
Sep 30
DEN5:45 pmDenver Intl
3h 50m
1 stop
DLH10:35 pmDuluth Intl
Oct 7
DLH4:15 pmDuluth Intl
4h 45m
1 stop
DEN8:00 pmDenver Intl
$314
Delta
Jul 17
DEN9:19 amDenver Intl
5h 23m
1 stop
DLH3:42 pmDuluth Intl
Jul 22
DLH5:00 amDuluth Intl
4h 06m
1 stop
DEN8:06 amDenver Intl
$373
Delta
Jun 27
DEN12:12 pmDenver Intl
6h 12m
1 stop
DLH7:24 pmDuluth Intl
Jun 30
DLH5:00 amDuluth Intl
4h 14m
1 stop
DEN8:14 amDenver Intl
$388

momondo 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, momondo users made 832,500 searches. Data last updated June 23, 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

Fri 8/14

3:50 pm-11:22 pm

1 stop6h 32m

Duluth Intl

Wed 8/19

6:23 pm-11:53 pm

1 stop6h 30m

$298

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 8/15

3:50 pm-11:22 pm

1 stop6h 32m

Duluth Intl

Wed 8/19

6:23 pm-11:53 pm

1 stop6h 30m

$309

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Wed 9/30

5:45 pm-10:35 pm

1 stop3h 50m

Duluth Intl

Wed 10/7

4:15 pm-8:00 pm

1 stop4h 45m

$314

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 7/17

9:19 am-3:42 pm

1 stop5h 23m

Duluth Intl

Wed 7/22

5:00 am-8:06 am

1 stop4h 06m

$373

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 8/28

3:50 pm-11:22 pm

1 stop6h 32m

Duluth Intl

Sat 8/29

7:45 am-12:45 pm

1 stop6h 00m

$378

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 8/15

3:50 pm-11:22 pm

1 stop6h 32m

Duluth Intl

Sat 8/22

7:45 am-2:31 pm

1 stop7h 46m

$393

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 8/14

3:50 pm-11:22 pm

1 stop6h 32m

Duluth Intl

Sun 8/23

6:23 pm-11:53 pm

1 stop6h 30m

$403
Quickest round-trip

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 7/24

6:00 am-11:04 am

1 stop4h 04m

Duluth Intl

Tue 7/28

5:00 am-8:06 am

1 stop4h 06m

$407

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 7/17

9:19 am-3:42 pm

1 stop5h 23m

Duluth Intl

Sun 7/19

8:00 am-12:05 pm

1 stop5h 05m

$418

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 7/16

6:00 am-7:25 pm

1 stop12h 25m

Duluth Intl

Wed 7/22

5:00 am-8:06 am

1 stop4h 06m

$421

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Duluth from

How to get the cheapest flight ticket from Colorado to Duluth

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Duluth?

The cheapest month to fly to Duluth from Colorado is in March. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Duluth from Colorado during February instead. Flights to Duluth in February, while not as cheap as those in March, still average around $0.

Can stopping save me money on Colorado to Duluth flights?

You could potentially save up to 5% on your flight if you consider stops on a Colorado to Duluth flight.

Cheap Colorado to Duluth flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Colorado to Duluth

Fastest flight time

3h 50m

Direct flights

None
The fastest flight from Colorado to Duluth takes 3h 50m
There are no direct flights from Colorado to Duluth. There are no popular flight routes from Colorado to Duluth.
Search flight deals

Frequently asked questions about flying from Colorado to Duluth

  • When did momondo last update prices for flights from Colorado to Duluth Intl Airport?

    Prices for flights from Colorado to Duluth Intl Airport were last updated today.

  • How many operators does momondo search for flights from Colorado to Duluth Intl Airport?

  • How old do you have to be to fly from Colorado to Duluth Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Colorado to Duluth Intl Airport.

  • What documentation or ID do you need to fly to Duluth Intl Airport?

    The travel and health documents you'll need for your trip to Duluth Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Duluth Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Colorado to Duluth

Compare and see reviews for airlines that fly from Colorado to Duluth with momondo
Airline
Rating
Free Cancellation
Price
Sun Country AirPriceFrom $68Free CancellationRating
6.8
329 reviews
Search Sun Country Air flights
DeltaPriceFrom $238Free CancellationRating
7.8
8,427 reviews
Search Delta flights
United AirlinesPriceFrom $258Free CancellationRating
7.4
9,876 reviews
Search United Airlines flights

Traveling to a place near Duluth?

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

Why use momondo?

Why should I use momondo to find a flight deal from Colorado to Duluth?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Colorado to Duluth. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Colorado to Duluth with flexible booking policies on momondo?

Flights from Colorado to Duluth with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Colorado to Duluth?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Duluth from Colorado.

I’m not ready to book a flight from Colorado to Duluth right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Duluth from Colorado. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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