What airlines fly to Duluth?

Delta, United Airlines and Sun Country Air are the top three most popular airlines that fly to Duluth from Colorado according to our data. Delta is the first choice among our users, with 66% of people opting to fly with this airline when traveling to Duluth. Keep in mind that there are 3 different airlines that fly to Duluth on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to Duluth?

If you’re flying from a popular airport in Colorado, such as Denver or Colorado Springs, and flying into Duluth, then you can expect flight times to average 3h 47m and 5h 28m, respectively.

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?

The number of operators available for flights from Colorado to Duluth Intl Airport is 3 as of September 2025.

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.

$273 Cheap Flights from Colorado to Duluth in 2025/26

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Find the cheapest flights from Colorado to Duluth

Round-trip

One-way

Last minute

Cheap round-trip flights

7:48 am - 2:32 pmDEN-DLH

5h 44m1 stop

8:00 am - 2:42 pmDLH-DEN

7h 42m1 stop

$273United Airlines

Find Deal

Tue, Oct 7 - Sat, Oct 11

6:05 am - 11:22 amDEN-DLH

4h 17m1 stop

4:10 pm - 7:30 pmDLH-DEN

4h 20m1 stop

$277Delta

Find Deal

Tue, Oct 21 - Tue, Oct 21

4:16 pm - 11:42 pmDEN-DLH

6h 26m1 stop

5:18 am - 10:00 amDLH-DEN

5h 42m1 stop

$303Delta

Find Deal

Wed, Oct 29 - Sun, Nov 2

6:00 am - 11:20 amDEN-DLH

4h 20m1 stop

12:01 pm - 3:39 pmDLH-DEN

4h 38m1 stop

$317Delta

Find Deal

Tue, Dec 2 - Fri, Dec 5

6:55 pm - 11:42 pmDEN-DLH

3h 47m1 stop

5:18 am - 10:00 amDLH-DEN

5h 42m1 stop

$378Delta

Find Deal

Thu, Oct 23 - Sun, Oct 26

6:00 am - 2:32 pmDEN-DLH

7h 32m1 stop

11:20 am - 4:35 pmDLH-DEN

6h 15m1 stop

$382United Airlines

Find Deal

Fri, Oct 17 - Tue, Oct 21

7:05 am - 7:37 pmDEN-DLH

11h 32m2 stops

4:20 pm - 10:36 pmDLH-DEN

7h 16m1 stop

$407Delta

Find Deal

Sat, Mar 7 - Wed, Mar 11

6:00 am - 2:32 pmDEN-DLH

7h 32m1 stop

11:20 am - 5:55 pmDLH-DEN

7h 35m1 stop

$408United Airlines

Find Deal

Tue, Oct 14 - Sat, Oct 18

6:55 pm - 11:42 pmDEN-DLH

3h 47m1 stop

7:50 am - 12:39 pmDLH-DEN

5h 49m1 stop

$413Delta

Find Deal

Thu, Oct 23 - Sun, Oct 26

6:05 am - 11:22 amDEN-DLH

4h 17m1 stop

7:50 am - 12:39 pmDLH-DEN

5h 49m1 stop

$418Delta

Find Deal

Fri, Oct 24 - Sun, Oct 26

United Airlines flights from Colorado to Duluth

Our best United Airlines deals on Colorado to Duluth flight tickets

United Airlines

Oct 7

DEN7:48 amDenver Intl

5h 44m

1 stop

DLH2:32 pmDuluth Intl

Oct 11

DLH8:00 amDuluth Intl

7h 42m

1 stop

DEN2:42 pmDenver Intl

$273

Find similar

United Airlines

Oct 17

DEN6:00 amDenver Intl

7h 32m

1 stop

DLH2:32 pmDuluth Intl

Oct 21

DLH11:20 amDuluth Intl

6h 15m

1 stop

DEN4:35 pmDenver Intl

$382

Find similar

United Airlines

Oct 14

DEN6:00 amDenver Intl

7h 32m

1 stop

DLH2:32 pmDuluth Intl

Oct 18

DLH11:20 amDuluth Intl

7h 35m

1 stop

DEN5:55 pmDenver Intl

$408

Find similar

Delta flights from Colorado to Duluth

Our best Delta deals on Colorado to Duluth flight tickets

Delta

Oct 21

DEN6:05 amDenver Intl

4h 17m

1 stop

DLH11:22 amDuluth Intl

Oct 21

DLH4:10 pmDuluth Intl

4h 20m

1 stop

DEN7:30 pmDenver Intl

$277

Find similar

Delta

Oct 29

DEN4:16 pmDenver Intl

6h 26m

1 stop

DLH11:42 pmDuluth Intl

Nov 2

DLH5:18 amDuluth Intl

5h 42m

1 stop

DEN10:00 amDenver Intl

$303

Find similar

Delta

Dec 2

DEN6:00 amDenver Intl

4h 20m

1 stop

DLH11:20 amDuluth Intl

Dec 5

DLH12:01 pmDuluth Intl

4h 38m

1 stop

DEN3:39 pmDenver Intl

$317

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 10/7

7:48 am-2:32 pm

1 stop5h 44m

Duluth Intl

Sat 10/11

8:00 am-2:42 pm

1 stop7h 42m

$273

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 10/21

6:05 am-11:22 am

1 stop4h 17m

Duluth Intl

Tue 10/21

4:10 pm-7:30 pm

1 stop4h 20m

$277

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Wed 10/29

4:16 pm-11:42 pm

1 stop6h 26m

Duluth Intl

Sun 11/2

5:18 am-10:00 am

1 stop5h 42m

$303

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 12/2

6:00 am-11:20 am

1 stop4h 20m

Duluth Intl

Fri 12/5

12:01 pm-3:39 pm

1 stop4h 38m

$317

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 10/23

6:55 pm-11:42 pm

1 stop3h 47m

Duluth Intl

Sun 10/26

5:18 am-10:00 am

1 stop5h 42m

$378

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 10/17

6:00 am-2:32 pm

1 stop7h 32m

Duluth Intl

Tue 10/21

11:20 am-4:35 pm

1 stop6h 15m

$382

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Sat 3/7

7:05 am-7:37 pm

2 stops11h 32m

Duluth Intl

Wed 3/11

4:20 pm-10:36 pm

1 stop7h 16m

$407

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Tue 10/14

6:00 am-2:32 pm

1 stop7h 32m

Duluth Intl

Sat 10/18

11:20 am-5:55 pm

1 stop7h 35m

$408

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Thu 10/23

6:55 pm-11:42 pm

1 stop3h 47m

Duluth Intl

Sun 10/26

7:50 am-12:39 pm

1 stop5h 49m

$413

DenverDuluth

DEN - DLH

DENDLH

Denver Intl

Fri 10/24

6:05 am-11:22 am

1 stop4h 17m

Duluth Intl

Sun 10/26

7:50 am-12:39 pm

1 stop5h 49m

$418

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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

Prices

Airlines

Other information

What is the cheapest month to fly to Duluth?

The cheapest month to fly to Duluth from Colorado is in August. Flight prices, which tend to average around $267, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of August, then book flights to Duluth from Colorado during November instead. Flights to Duluth in November, while not as cheap as those in August, still average around $296.

What is the cheapest day to depart on your flight to Duluth?

The cheapest day to depart from Colorado to Duluth is on a Monday when prices can be found for as low as $223. On the other hand, Saturday is the most expensive day to depart from Colorado because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $408.

What is the cheapest time of day to depart on your flight to Duluth?

Flying to Duluth from Colorado in the evening is the least expensive time of day to depart. momondo users have found prices as low as $268 when looking at flights departing in the evening. In contrast, the most expensive time of day to depart to Duluth is in the morning when prices are around $367.

How far in advance should I book a flight to Duluth?

You are more likely to see cheaper flights to Duluth from Colorado when booking weeks ahead of your departure date. In general, you can expect to find flights to Duluth for around $349 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Duluth from Colorado for as low as $210 on momondo.

Cheap Colorado to Duluth flight deals and tips

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

Direct flights	None

There are no direct flights from Colorado to Duluth. There are no popular flight routes from Colorado to Duluth.

Search flight deals

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?
The number of operators available for flights from Colorado to Duluth Intl Airport is 3 as of September 2025.
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 Air	PriceFrom $68	Free Cancellation	Rating 6.9 330 reviews	Search Sun Country Air flights
Delta	PriceFrom $221	Free Cancellation	Rating 7.9 7,971 reviews	Search Delta flights
United Airlines	PriceFrom $250	Free Cancellation	Rating 7.4 8,922 reviews	Search United Airlines flights

Two Harbors

Hayward

Superior

Cloquet

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.