What is the cheapest airline that flies from Duluth Intl to Seattle/Tacoma Intl?

Delta and United Airlines are the most popular carriers operating from Duluth Intl to Seattle/Tacoma Intl

When did momondo last update prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

How many operators does momondo search for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?

The number of operators available for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport is 2 as of April 2026.

How old do you have to be to fly from Duluth Intl Airport to Seattle/Tacoma Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Duluth Intl Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents you'll need for your trip to Seattle/Tacoma 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 Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$363 Cheap Flights from Duluth to Seattle in 2026

Q: What is the typical price of a round-trip flight between Duluth and Seattle?

Prices are currently low for flights on this route. Typical prices usually range from $448 to $396. The lowest price recently found on this route was $363.

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Find the cheapest flights from Duluth to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

12:00 pm - 4:13 pm

DLH

SEA

6h 13m

1 stop

6:05 am - 3:44 pm

SEA

DLH

7h 39m

1 stop

$363Delta

Fri, Oct 2 - Sat, Oct 10

11:14 am - 7:00 pm

DLH

SEA

9h 46m

1 stop

7:00 am - 5:20 pm

SEA

DLH

8h 20m

1 stop

$378United Airlines

Tue, May 5 - Sat, May 9

5:00 am - 2:36 pm

DLH

SEA

11h 36m

2 stops

7:00 am - 5:20 pm

SEA

DLH

8h 20m

1 stop

$383United Airlines

Tue, May 5 - Sat, May 9

11:19 am - 7:00 pm

DLH

SEA

9h 41m

1 stop

11:53 pm - 10:34 am

SEA

DLH

8h 41m

1 stop

$388United Airlines

Wed, Apr 29 - Sun, May 3

3:03 pm - 10:39 pm

DLH

SEA

9h 36m

1 stop

11:52 pm - 10:43 am

SEA

DLH

8h 51m

1 stop

$393United Airlines

Thu, May 28 - Sun, May 31

6:44 pm - 11:59 pm

DLH

SEA

7h 15m

1 stop

7:36 pm - 10:34 am

SEA

DLH

12h 58m

2 stops

$394United Airlines

Fri, May 1 - Tue, May 5

5:10 am - 8:50 am

DLH

SEA

5h 40m

1 stop

6:05 am - 3:19 pm

SEA

DLH

7h 14m

1 stop

$423Delta

Wed, Sep 9 - Mon, Sep 21

6:10 pm - 12:14 am

DLH

SEA

8h 04m

1 stop

7:32 pm - 10:44 am

SEA

DLH

13h 12m

2 stops

$434United Airlines

Fri, Oct 2 - Sat, Oct 10

5:00 am - 3:40 pm

DLH

SEA

12h 40m

2 stops

6:51 pm - 10:44 am

SEA

DLH

13h 53m

2 stops

$439United Airlines

Fri, Oct 2 - Sat, Oct 10

3:08 pm - 10:56 pm

DLH

SEA

9h 48m

2 stops

11:53 pm - 10:34 am

SEA

DLH

8h 41m

1 stop

$463United Airlines

Wed, Apr 29 - Sun, May 3

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

May 5

DLH11:14 amDuluth Intl

9h 46m

1 stop

SEA7:00 pmSeattle/Tacoma Intl

May 9

SEA7:00 amSeattle/Tacoma Intl

8h 20m

1 stop

DLH5:20 pmDuluth Intl

$378

United Airlines

May 5

DLH5:00 amDuluth Intl

11h 36m

2 stops

SEA2:36 pmSeattle/Tacoma Intl

May 9

SEA7:00 amSeattle/Tacoma Intl

8h 20m

1 stop

DLH5:20 pmDuluth Intl

$383

United Airlines

Apr 29

DLH11:19 amDuluth Intl

9h 41m

1 stop

SEA7:00 pmSeattle/Tacoma Intl

May 3

SEA11:53 pmSeattle/Tacoma Intl

8h 41m

1 stop

DLH10:34 amDuluth Intl

$388

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 10/2

12:00 pm-4:13 pm

1 stop6h 13m

Seattle/Tacoma Intl

Sat 10/10

6:05 am-3:44 pm

1 stop7h 39m

$363

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 5/5

11:14 am-7:00 pm

1 stop9h 46m

Seattle/Tacoma Intl

Sat 5/9

7:00 am-5:20 pm

1 stop8h 20m

$378

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 5/5

5:00 am-2:36 pm

2 stops11h 36m

Seattle/Tacoma Intl

Sat 5/9

7:00 am-5:20 pm

1 stop8h 20m

$383

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 4/29

11:19 am-7:00 pm

1 stop9h 41m

Seattle/Tacoma Intl

Sun 5/3

11:53 pm-10:34 am

1 stop8h 41m

$388

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 5/28

3:03 pm-10:39 pm

1 stop9h 36m

Seattle/Tacoma Intl

Sun 5/31

11:52 pm-10:43 am

1 stop8h 51m

$393

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 5/1

6:44 pm-11:59 pm

1 stop7h 15m

Seattle/Tacoma Intl

Tue 5/5

7:36 pm-10:34 am

2 stops12h 58m

$394

Quickest round-trip

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 9/9

5:10 am-8:50 am

1 stop5h 40m

Seattle/Tacoma Intl

Mon 9/21

6:05 am-3:19 pm

1 stop7h 14m

$423

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 10/2

6:10 pm-12:14 am

1 stop8h 04m

Seattle/Tacoma Intl

Sat 10/10

7:32 pm-10:44 am

2 stops13h 12m

$434

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 10/2

5:00 am-3:40 pm

2 stops12h 40m

Seattle/Tacoma Intl

Sat 10/10

6:51 pm-10:44 am

2 stops13h 53m

$439

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 4/29

3:08 pm-10:56 pm

2 stops9h 48m

Seattle/Tacoma Intl

Sun 5/3

11:53 pm-10:34 am

1 stop8h 41m

$463

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first

How to get the cheapest flight ticket from Duluth to Seattle

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

What is the typical price of a round-trip flight between Duluth and Seattle?

When to book flights from Duluth to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Duluth to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Duluth to Seattle (DLH to SEA) flight deals and tips

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

Fastest flight time	5h 40m
Direct flights	None

The fastest flight from Duluth to Seattle takes 5h 40m

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

Search flight deals

Frequently asked questions about flying from Duluth to Seattle

How far is Duluth Intl to Seattle/Tacoma Intl by plane?
The distance between Duluth Intl and Seattle/Tacoma Intl is about 1410.5 mi. Flights usually cover this in 5h 40m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport is 2 as of April 2026.
How old do you have to be to fly from Duluth Intl Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Duluth Intl Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma 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 Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Duluth to Seattle?
Based on momondo bookings for flights between Duluth and Seattle, the leading airline is Delta, making up 64% of the total bookings. Other popular airlines include United Airlines with 36%.

Best airlines flying from Duluth to Seattle

Compare and see reviews for airlines that fly from Duluth to Seattle with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $258	Free Cancellation	Rating 7.4 9,604 reviews		Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.9 8,422 reviews		Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Lakewood

Tukwila

Puyallup

Cle Elum

Federal Way

Centralia

Fife

Westport

Shoreline

Tumwater

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Yes. momondo allows you to filter the results for Duluth to Seattle flights to just show those with flexible booking policies.

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