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

United Airlines and Delta 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 March 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.

$233 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 $389 to $528. The lowest price recently found on this route was $338.

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

5:10 am - 8:50 am

DLH

SEA

5h 40m

1 stop

6:05 am - 3:19 pm

SEA

DLH

7h 14m

1 stop

$338Delta

Sat, Aug 29 - Wed, Sep 2

5:10 am - 8:50 am

DLH

SEA

5h 40m

1 stop

6:05 am - 3:19 pm

SEA

DLH

7h 14m

1 stop

$363Delta

Sat, Aug 29 - Tue, Sep 1

6:44 pm - 11:59 pm

DLH

SEA

7h 15m

1 stop

1:36 pm - 11:08 pm

SEA

DLH

7h 32m

1 stop

$381United Airlines

Wed, May 20 - Wed, May 27

6:44 pm - 11:59 pm

DLH

SEA

7h 15m

1 stop

11:02 am - 11:08 pm

SEA

DLH

10h 06m

2 stops

$386United Airlines

Wed, May 20 - Wed, May 27

5:10 am - 8:50 am

DLH

SEA

5h 40m

1 stop

6:05 am - 3:19 pm

SEA

DLH

7h 14m

1 stop

$393Delta

Sat, Aug 29 - Sun, Sep 6

11:19 am - 4:41 pm

DLH

SEA

7h 22m

1 stop

5:45 pm - 10:39 am

SEA

DLH

14h 54m

2 stops

$413United Airlines

Fri, Apr 3 - Tue, Apr 7

11:19 am - 7:00 pm

DLH

SEA

9h 41m

1 stop

11:59 pm - 10:39 am

SEA

DLH

8h 40m

1 stop

$414United Airlines

Fri, Apr 3 - Tue, Apr 7

5:10 am - 8:50 am

DLH

SEA

5h 40m

1 stop

6:05 am - 3:19 pm

SEA

DLH

7h 14m

1 stop

$417Delta

Wed, Sep 9 - Mon, Sep 21

11:14 am - 7:00 pm

DLH

SEA

9h 46m

1 stop

11:53 pm - 10:34 am

SEA

DLH

8h 41m

1 stop

$418United Airlines

Sat, May 2 - Tue, May 5

5:00 am - 11:17 am

DLH

SEA

8h 17m

1 stop

6:51 pm - 10:30 am

SEA

DLH

13h 39m

2 stops

$424United Airlines

Wed, Sep 9 - Mon, Sep 21

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Aug 29

DLH5:10 amDuluth Intl

5h 40m

1 stop

SEA8:50 amSeattle/Tacoma Intl

Sep 2

SEA6:05 amSeattle/Tacoma Intl

7h 14m

1 stop

DLH3:19 pmDuluth Intl

$338

Delta

Aug 29

DLH5:10 amDuluth Intl

5h 40m

1 stop

SEA8:50 amSeattle/Tacoma Intl

Sep 1

SEA6:05 amSeattle/Tacoma Intl

7h 14m

1 stop

DLH3:19 pmDuluth Intl

$363

Delta

Aug 29

DLH5:10 amDuluth Intl

5h 40m

1 stop

SEA8:50 amSeattle/Tacoma Intl

Sep 6

SEA6:05 amSeattle/Tacoma Intl

7h 14m

1 stop

DLH3:19 pmDuluth Intl

$393

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

May 20

DLH6:44 pmDuluth Intl

7h 15m

1 stop

SEA11:59 pmSeattle/Tacoma Intl

May 27

SEA1:36 pmSeattle/Tacoma Intl

7h 32m

1 stop

DLH11:08 pmDuluth Intl

$381

United Airlines

May 20

DLH6:44 pmDuluth Intl

7h 15m

1 stop

SEA11:59 pmSeattle/Tacoma Intl

May 27

SEA11:02 amSeattle/Tacoma Intl

10h 06m

2 stops

DLH11:08 pmDuluth Intl

$386

United Airlines

May 2

DLH11:14 amDuluth Intl

9h 46m

1 stop

SEA7:00 pmSeattle/Tacoma Intl

May 5

SEA11:53 pmSeattle/Tacoma Intl

8h 41m

1 stop

DLH10:34 amDuluth Intl

$418

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 8/29

5:10 am-8:50 am

1 stop5h 40m

Seattle/Tacoma Intl

Wed 9/2

6:05 am-3:19 pm

1 stop7h 14m

$338

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 8/29

5:10 am-8:50 am

1 stop5h 40m

Seattle/Tacoma Intl

Tue 9/1

6:05 am-3:19 pm

1 stop7h 14m

$363

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 5/20

6:44 pm-11:59 pm

1 stop7h 15m

Seattle/Tacoma Intl

Wed 5/27

1:36 pm-11:08 pm

1 stop7h 32m

$381

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 5/20

6:44 pm-11:59 pm

1 stop7h 15m

Seattle/Tacoma Intl

Wed 5/27

11:02 am-11:08 pm

2 stops10h 06m

$386

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 8/29

5:10 am-8:50 am

1 stop5h 40m

Seattle/Tacoma Intl

Sun 9/6

6:05 am-3:19 pm

1 stop7h 14m

$393

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 4/3

11:19 am-4:41 pm

1 stop7h 22m

Seattle/Tacoma Intl

Tue 4/7

5:45 pm-10:39 am

2 stops14h 54m

$413

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 4/3

11:19 am-7:00 pm

1 stop9h 41m

Seattle/Tacoma Intl

Tue 4/7

11:59 pm-10:39 am

1 stop8h 40m

$414

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

$417

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 5/2

11:14 am-7:00 pm

1 stop9h 46m

Seattle/Tacoma Intl

Tue 5/5

11:53 pm-10:34 am

1 stop8h 41m

$418

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 9/9

5:00 am-11:17 am

1 stop8h 17m

Seattle/Tacoma Intl

Mon 9/21

6:51 pm-10:30 am

2 stops13h 39m

$424

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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

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 March 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 67% of the total bookings. Other popular airlines include United Airlines with 33%.

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 9,439 reviews		Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.9 8,292 reviews		Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Redmond

Marysville

Puyallup

Cle Elum

Lakewood

Tukwila

Federal Way

Fife

Westport

Centralia

Kirkland

Tumwater

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Duluth to Seattle. momondo saves you time and could save you money on your trip.

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

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

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

Once you have performed a search for Duluth to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Of course. momondo tracks the price of Duluth to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.