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 September 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.

$323 Cheap Flights from Duluth to Seattle in 2026

Discover deals from 900+ travel sites with momondo.

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.

11:43 am - 4:45 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 02m1 stop Minneapolis St Paul

6:00 am - 3:29 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 29m1 stop Minneapolis St Paul

$328Delta

Sat, Sep 26 - Sat, Oct 3

12:06 pm - 5:10 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 04m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$328Delta

Mon, Nov 9 - Mon, Nov 16

4:45 pm - 11:54 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 09m1 stop Minneapolis St Paul

6:00 am - 4:32 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

8h 32m1 stop Minneapolis St Paul

$398Delta

Thu, Dec 17 - Mon, Dec 28

3:10 pm - 10:45 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 35m1 stop Chicago O'Hare Intl

7:00 am - 5:51 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

8h 51m1 stop Chicago O'Hare Intl

$415United Airlines

Tue, Sep 15 - Sat, Sep 19

3:10 pm - 10:56 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 46m1 stop Chicago O'Hare Intl

11:13 pm - 10:42 amSEA Seattle/Tacoma Intl-DLH Duluth Intl

9h 29m1 stop Chicago O'Hare Intl

$418United Airlines

Wed, Sep 30 - Mon, Oct 5

7:35 am - 4:18 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

10h 43m1 stop Chicago O'Hare Intl

7:00 am - 6:10 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

9h 10m1 stop Chicago O'Hare Intl

$418United Airlines

Sat, Dec 5 - Wed, Dec 9

3:14 pm - 10:33 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 19m1 stop Chicago O'Hare Intl

2:19 pm - 11:04 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

6h 45m1 stop Chicago O'Hare Intl

$418United Airlines

Sat, Dec 5 - Wed, Dec 9

Cheap last minute flights

Enter your travel dates to find the best prices.

5:15 am - 8:48 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

5h 33m1 stop Minneapolis St Paul

6:00 am - 3:29 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 29m1 stop Minneapolis St Paul

$468Delta

Sat, Sep 5 - Wed, Sep 9

5:15 am - 11:00 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 45m1 stop Minneapolis St Paul

6:05 am - 3:31 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 26m1 stop Minneapolis St Paul

$498Delta

Tue, Sep 1 - Sat, Sep 5

5:15 am - 11:00 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 45m1 stop Minneapolis St Paul

2:30 pm - 10:41 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

6h 11m1 stop Minneapolis St Paul

$498Delta

Tue, Sep 1 - Sat, Sep 5

3:11 pm - 10:43 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 32m1 stop Chicago O'Hare Intl

5:00 am - 5:48 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

10h 48m2 stops Denver Intl Chicago O'Hare Intl

$504United Airlines

Sat, Sep 5 - Wed, Sep 9

7:45 am - 4:14 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

10h 29m2 stops Chicago O'Hare Intl San Francisco

5:00 am - 5:48 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

10h 48m2 stops Denver Intl Chicago O'Hare Intl

$509United Airlines

Sat, Sep 5 - Wed, Sep 9

5:15 am - 11:00 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 45m1 stop Minneapolis St Paul

2:30 pm - 10:41 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

6h 11m1 stop Minneapolis St Paul

$528Delta

Tue, Sep 1 - Sat, Sep 5

3:11 pm - 10:43 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 32m1 stop Chicago O'Hare Intl

5:20 pm - 10:40 amSEA Seattle/Tacoma Intl-DLH Duluth Intl

15h 20m2 stops San Francisco Chicago O'Hare Intl

$564United Airlines

Sat, Sep 5 - Tue, Sep 8

7:45 am - 4:14 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

10h 29m2 stops Chicago O'Hare Intl San Francisco

5:20 pm - 10:40 amSEA Seattle/Tacoma Intl-DLH Duluth Intl

15h 20m2 stops San Francisco Chicago O'Hare Intl

$569United Airlines

Sat, Sep 5 - Tue, Sep 8

11:18 am - 9:31 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

12h 13m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 5:34 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

8h 34m1 stop Chicago O'Hare Intl

$594United Airlines

Tue, Sep 1 - Sat, Sep 5

7:45 am - 5:42 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

11h 57m2 stops Chicago O'Hare Intl Denver Intl

7:00 am - 5:34 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

8h 34m1 stop Chicago O'Hare Intl

$594United Airlines

Tue, Sep 1 - Sat, Sep 5

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United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

Sep 15

DLH3:10 pmDuluth Intl

9h 35m

1 stop

SEA10:45 pmSeattle/Tacoma Intl

Sep 19

SEA7:00 amSeattle/Tacoma Intl

8h 51m

1 stop

DLH5:51 pmDuluth Intl

$415

United Airlines

Sep 30

DLH3:10 pmDuluth Intl

9h 46m

1 stop

SEA10:56 pmSeattle/Tacoma Intl

Oct 5

SEA11:13 pmSeattle/Tacoma Intl

9h 29m

1 stop

DLH10:42 amDuluth Intl

$418

United Airlines

Sep 30

DLH3:10 pmDuluth Intl

9h 46m

1 stop

SEA10:56 pmSeattle/Tacoma Intl

Oct 5

SEA7:25 pmSeattle/Tacoma Intl

13h 17m

2 stops

DLH10:42 amDuluth Intl

$424

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Sep 26

DLH11:43 amDuluth Intl

7h 02m

1 stop

SEA4:45 pmSeattle/Tacoma Intl

Oct 3

SEA6:00 amSeattle/Tacoma Intl

7h 29m

1 stop

DLH3:29 pmDuluth Intl

$328

Delta

Dec 17

DLH4:45 pmDuluth Intl

9h 09m

1 stop

SEA11:54 pmSeattle/Tacoma Intl

Dec 28

SEA6:00 amSeattle/Tacoma Intl

8h 32m

1 stop

DLH4:32 pmDuluth Intl

$398

Delta

Sep 5

DLH5:15 amDuluth Intl

5h 33m

1 stop

SEA8:48 amSeattle/Tacoma Intl

Sep 9

SEA6:00 amSeattle/Tacoma Intl

7h 29m

1 stop

DLH3:29 pmDuluth Intl

$468

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sat 9/26

11:43 am-4:45 pm

1 stop7h 02m

Seattle/Tacoma Intl

Sat 10/3

6:00 am-3:29 pm

1 stop7h 29m

$328

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Mon 11/9

12:06 pm-5:10 pm

1 stop7h 04m

Seattle/Tacoma Intl

Mon 11/16

6:00 am-3:45 pm

1 stop7h 45m

$328

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Thu 12/17

4:45 pm-11:54 pm

1 stop9h 09m

Seattle/Tacoma Intl

Mon 12/28

6:00 am-4:32 pm

1 stop8h 32m

$398

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Tue 9/15

3:10 pm-10:45 pm

1 stop9h 35m

Seattle/Tacoma Intl

Sat 9/19

7:00 am-5:51 pm

1 stop8h 51m

$415

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Wed 9/30

3:10 pm-10:56 pm

1 stop9h 46m

Seattle/Tacoma Intl

Mon 10/5

11:13 pm-10:42 am

1 stop9h 29m

$418

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sat 12/5

7:35 am-4:18 pm

1 stop10h 43m

Seattle/Tacoma Intl

Wed 12/9

7:00 am-6:10 pm

1 stop9h 10m

$418

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sat 12/5

3:14 pm-10:33 pm

1 stop9h 19m

Seattle/Tacoma Intl

Wed 12/9

2:19 pm-11:04 pm

1 stop6h 45m

$418

Cheapest one-way

Quickest one-way

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sun 9/27

6:00 am-11:27 am

1 stop7h 27m

$323

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Wed 9/9

7:45 am-7:08 pm

2 stops13h 23m

$404

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Wed 9/9

11:18 am-7:15 pm

1 stop9h 57m

$420

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

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

United Airlines is the most popular carrier operating from Duluth Intl to Seattle/Tacoma Intl

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

Best Price Found	$323
Fastest flight time	6h 35m
Direct flights	None

The best one-way flight to Seattle from Duluth in the past 72 hours is $323. The best round-trip flight deal from Duluth to Seattle found on momondo in the last 72 hours is $328.

The fastest flight from Duluth to Seattle takes 6h 35m

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 6h 35m, 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 September 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 53% of the total bookings. Other popular airlines include United Airlines with 47%.

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
Delta	PriceFrom $273	Free Cancellation	Rating 7.8 8,533 reviews		Search Delta flights
United Airlines	PriceFrom $307	Free Cancellation	Rating 7.4 10,146 reviews		Search United Airlines flights

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Kent

Olympia

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Lakewood

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Fife

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Cle Elum

Marysville

Kirkland

Centralia

Lacey

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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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