What airlines fly to Seattle?

Delta, United Airlines and Sun Country Air are the top three most popular airlines that fly to Seattle from Duluth 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 Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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 3 as of January 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.

$278 Cheap Flights from Duluth to Seattle in 2026

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Find the cheapest flights from Duluth to Seattle

Round-trip

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Cheap round-trip flights

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8:00 am - 2:45 pm

DLH

SEA

8h 45m1 stop

6:05 am - 3:44 pm

SEA

DLH

7h 39m1 stop

$278Delta

Sat, Feb 7 - Sun, Feb 8

4:24 pm - 8:46 pm

DLH

SEA

6h 22m1 stop

3:35 pm - 11:52 pm

SEA

DLH

6h 17m1 stop

$333Delta

Tue, Jan 20 - Tue, Jan 27

4:24 pm - 8:46 pm

DLH

SEA

6h 22m1 stop

6:05 am - 3:44 pm

SEA

DLH

7h 39m1 stop

$401Delta

Sat, Jan 31 - Sat, Feb 7

7:40 am - 6:26 pm

DLH

SEA

12h 46m2 stops

8:10 am - 9:59 pm

SEA

DLH

11h 49m2 stops

$402United Airlines

Sat, Jan 31 - Sat, Feb 7

3:05 pm - 12:59 am

DLH

SEA

11h 54m2 stops

8:10 am - 9:59 pm

SEA

DLH

11h 49m2 stops

$406United Airlines

Fri, Jan 16 - Tue, Jan 20

7:40 am - 9:12 pm

DLH

SEA

15h 32m3 stops

8:10 am - 9:59 pm

SEA

DLH

11h 49m2 stops

$415United Airlines

Sat, Jan 31 - Sat, Feb 7

11:56 am - 4:45 pm

DLH

SEA

6h 49m1 stop

3:35 pm - 11:52 pm

SEA

DLH

6h 17m1 stop

$432Delta

Fri, Jan 16 - Tue, Jan 20

7:40 am - 6:26 pm

DLH

SEA

12h 46m2 stops

10:58 am - 9:59 pm

SEA

DLH

9h 01m1 stop

$453United Airlines

Sat, Jan 31 - Sat, Feb 7

7:40 am - 4:01 pm

DLH

SEA

10h 21m1 stop

8:10 am - 9:59 pm

SEA

DLH

11h 49m2 stops

$475United Airlines

Tue, Jan 20 - Tue, Jan 27

7:40 am - 4:01 pm

DLH

SEA

10h 21m1 stop

8:40 am - 9:59 pm

SEA

DLH

11h 19m2 stops

$481United Airlines

Tue, Jan 20 - Tue, Jan 27

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Feb 7

DLH8:00 amDuluth Intl

8h 45m

1 stop

SEA2:45 pmSeattle/Tacoma Intl

Feb 8

SEA6:05 amSeattle/Tacoma Intl

7h 39m

1 stop

DLH3:44 pmDuluth Intl

$278

Find similar

Delta

Jan 20

DLH4:24 pmDuluth Intl

6h 22m

1 stop

SEA8:46 pmSeattle/Tacoma Intl

Jan 27

SEA3:35 pmSeattle/Tacoma Intl

6h 17m

1 stop

DLH11:52 pmDuluth Intl

$333

Find similar

Delta

Jan 31

DLH4:24 pmDuluth Intl

6h 22m

1 stop

SEA8:46 pmSeattle/Tacoma Intl

Feb 7

SEA6:05 amSeattle/Tacoma Intl

7h 39m

1 stop

DLH3:44 pmDuluth Intl

$401

Find similar

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

Jan 31

DLH7:40 amDuluth Intl

12h 46m

2 stops

SEA6:26 pmSeattle/Tacoma Intl

Feb 7

SEA8:10 amSeattle/Tacoma Intl

11h 49m

2 stops

DLH9:59 pmDuluth Intl

$402

Find similar

United Airlines

Jan 16

DLH3:05 pmDuluth Intl

11h 54m

2 stops

SEA12:59 amSeattle/Tacoma Intl

Jan 20

SEA8:10 amSeattle/Tacoma Intl

11h 49m

2 stops

DLH9:59 pmDuluth Intl

$406

Find similar

United Airlines

Jan 31

DLH7:40 amDuluth Intl

15h 32m

3 stops

SEA9:12 pmSeattle/Tacoma Intl

Feb 7

SEA8:10 amSeattle/Tacoma Intl

11h 49m

2 stops

DLH9:59 pmDuluth Intl

$415

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 2/7

8:00 am-2:45 pm

1 stop8h 45m

Seattle/Tacoma Intl

Sun 2/8

6:05 am-3:44 pm

1 stop7h 39m

$278

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 1/20

4:24 pm-8:46 pm

1 stop6h 22m

Seattle/Tacoma Intl

Tue 1/27

3:35 pm-11:52 pm

1 stop6h 17m

$333

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 1/31

4:24 pm-8:46 pm

1 stop6h 22m

Seattle/Tacoma Intl

Sat 2/7

6:05 am-3:44 pm

1 stop7h 39m

$401

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 1/31

7:40 am-6:26 pm

2 stops12h 46m

Seattle/Tacoma Intl

Sat 2/7

8:10 am-9:59 pm

2 stops11h 49m

$402

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 1/16

3:05 pm-12:59 am

2 stops11h 54m

Seattle/Tacoma Intl

Tue 1/20

8:10 am-9:59 pm

2 stops11h 49m

$406

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 1/31

7:40 am-9:12 pm

3 stops15h 32m

Seattle/Tacoma Intl

Sat 2/7

8:10 am-9:59 pm

2 stops11h 49m

$415

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 1/16

11:56 am-4:45 pm

1 stop6h 49m

Seattle/Tacoma Intl

Tue 1/20

3:35 pm-11:52 pm

1 stop6h 17m

$432

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 1/31

7:40 am-6:26 pm

2 stops12h 46m

Seattle/Tacoma Intl

Sat 2/7

10:58 am-9:59 pm

1 stop9h 01m

$453

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 1/20

7:40 am-4:01 pm

1 stop10h 21m

Seattle/Tacoma Intl

Tue 1/27

8:10 am-9:59 pm

2 stops11h 49m

$475

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 1/20

7:40 am-4:01 pm

1 stop10h 21m

Seattle/Tacoma Intl

Tue 1/27

8:40 am-9:59 pm

2 stops11h 19m

$481

Flights are sorted by cheapest round-trip flights first.

Sorted 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 cheapest month to fly to Seattle?

In general, September is the cheapest month to fly from Duluth to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $258. If you don’t want to visit Seattle in September, then you should wait until December to fly from Duluth, when ticket prices are also cheap, with an average price of $273.

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	6h 22m
Direct flights	None

The fastest flight from Duluth to Seattle takes 6h 22m

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 6h 22m, 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 3 as of January 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 66% of the total bookings. Other popular airlines include United Airlines with 18% and Sun Country Air with 16%.

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
Sun Country Air	PriceFrom $93	Free Cancellation	Rating 6.9 338 reviews	Search Sun Country Air flights
United Airlines	PriceFrom $258	Free Cancellation	Rating 7.4 9,134 reviews	Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.9 8,021 reviews	Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Tukwila

Federal Way

Cle Elum

Lakewood

Centralia

Fife

Westport

Kirkland

Shoreline

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?

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