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 July 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.

$268 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

Cheap round-trip flights

Enter your travel dates to find the best prices.

4:11 pm - 10:00 pm

DLH

SEA

7h 49m

1 stop

6:05 am - 3:31 pm

SEA

DLH

7h 26m

1 stop

$318Delta

Tue, Sep 1 - Sat, Sep 5

6:00 am - 11:27 am

DLH

SEA

7h 27m

1 stop

11:14 pm - 2:29 pm

SEA

DLH

13h 15m

2 stops

$324United Airlines

Wed, Sep 30 - Tue, Oct 6

3:10 pm - 10:45 pm

DLH

SEA

9h 35m

1 stop

11:13 pm - 10:40 am

SEA

DLH

9h 27m

1 stop

$333United Airlines

Fri, Sep 18 - Fri, Sep 25

3:10 pm - 10:45 pm

DLH

SEA

9h 35m

1 stop

8:29 pm - 10:40 am

SEA

DLH

12h 11m

2 stops

$339United Airlines

Fri, Sep 18 - Fri, Sep 25

4:11 pm - 10:00 pm

DLH

SEA

7h 49m

1 stop

6:05 am - 3:31 pm

SEA

DLH

7h 26m

1 stop

$343Delta

Tue, Sep 1 - Sat, Sep 5

7:45 am - 4:14 pm

DLH

SEA

10h 29m

2 stops

11:00 pm - 10:42 am

SEA

DLH

9h 42m

1 stop

$414United Airlines

Tue, Sep 1 - Sat, Sep 5

7:45 am - 4:14 pm

DLH

SEA

10h 29m

2 stops

10:58 pm - 5:38 pm

SEA

DLH

16h 40m

2 stops

$419United Airlines

Tue, Sep 1 - Sat, Sep 5

3:10 pm - 10:45 pm

DLH

SEA

9h 35m

1 stop

11:00 pm - 10:42 am

SEA

DLH

9h 42m

1 stop

$478United Airlines

Wed, Sep 9 - Mon, Sep 21

3:10 pm - 10:45 pm

DLH

SEA

9h 35m

1 stop

6:52 pm - 10:42 am

SEA

DLH

13h 50m

2 stops

$484United Airlines

Wed, Sep 9 - Mon, Sep 21

11:26 am - 9:23 pm

DLH

SEA

11h 57m

2 stops

7:00 am - 11:04 pm

SEA

DLH

14h 04m

2 stops

$489United Airlines

Wed, Nov 4 - Sat, Nov 7

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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 30

DLH6:00 amDuluth Intl

7h 27m

1 stop

SEA11:27 amSeattle/Tacoma Intl

Oct 6

SEA11:14 pmSeattle/Tacoma Intl

13h 15m

2 stops

DLH2:29 pmDuluth Intl

$324

United Airlines

Sep 18

DLH3:10 pmDuluth Intl

9h 35m

1 stop

SEA10:45 pmSeattle/Tacoma Intl

Sep 25

SEA11:13 pmSeattle/Tacoma Intl

9h 27m

1 stop

DLH10:40 amDuluth Intl

$333

United Airlines

Sep 18

DLH3:10 pmDuluth Intl

9h 35m

1 stop

SEA10:45 pmSeattle/Tacoma Intl

Sep 25

SEA8:29 pmSeattle/Tacoma Intl

12h 11m

2 stops

DLH10:40 amDuluth Intl

$339

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Sep 1

DLH4:11 pmDuluth Intl

7h 49m

1 stop

SEA10:00 pmSeattle/Tacoma Intl

Sep 5

SEA6:05 amSeattle/Tacoma Intl

7h 26m

1 stop

DLH3:31 pmDuluth Intl

$318

Delta

Sep 1

DLH4:11 pmDuluth Intl

7h 49m

1 stop

SEA10:00 pmSeattle/Tacoma Intl

Sep 5

SEA6:05 amSeattle/Tacoma Intl

7h 26m

1 stop

DLH3:31 pmDuluth Intl

$343

Delta

Sep 11

DLH5:15 amDuluth Intl

7h 24m

1 stop

SEA10:39 amSeattle/Tacoma Intl

Sep 13

SEA11:59 amSeattle/Tacoma Intl

5h 26m

1 stop

DLH7:25 pmDuluth Intl

$536

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Quickest round-trip

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 9/1

4:11 pm-10:00 pm

1 stop7h 49m

Seattle/Tacoma Intl

Sat 9/5

6:05 am-3:31 pm

1 stop7h 26m

$318

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 9/30

6:00 am-11:27 am

1 stop7h 27m

Seattle/Tacoma Intl

Tue 10/6

11:14 pm-2:29 pm

2 stops13h 15m

$324

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 9/18

3:10 pm-10:45 pm

1 stop9h 35m

Seattle/Tacoma Intl

Fri 9/25

11:13 pm-10:40 am

1 stop9h 27m

$333

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 9/18

3:10 pm-10:45 pm

1 stop9h 35m

Seattle/Tacoma Intl

Fri 9/25

8:29 pm-10:40 am

2 stops12h 11m

$339

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 9/1

4:11 pm-10:00 pm

1 stop7h 49m

Seattle/Tacoma Intl

Sat 9/5

6:05 am-3:31 pm

1 stop7h 26m

$343

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 9/1

7:45 am-4:14 pm

2 stops10h 29m

Seattle/Tacoma Intl

Sat 9/5

11:00 pm-10:42 am

1 stop9h 42m

$414

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 9/1

7:45 am-4:14 pm

2 stops10h 29m

Seattle/Tacoma Intl

Sat 9/5

10:58 pm-5:38 pm

2 stops16h 40m

$419

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 9/9

3:10 pm-10:45 pm

1 stop9h 35m

Seattle/Tacoma Intl

Mon 9/21

11:00 pm-10:42 am

1 stop9h 42m

$478

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 9/9

3:10 pm-10:45 pm

1 stop9h 35m

Seattle/Tacoma Intl

Mon 9/21

6:52 pm-10:42 am

2 stops13h 50m

$484

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 11/4

11:26 am-9:23 pm

2 stops11h 57m

Seattle/Tacoma Intl

Sat 11/7

7:00 am-11:04 pm

2 stops14h 04m

$489

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

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

Fastest flight time	7h 19m
Direct flights	None

The fastest flight from Duluth to Seattle takes 7h 19m

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 7h 19m, 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 July 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 52% of the total bookings. Other popular airlines include United Airlines with 48%.

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 9,927 reviews		Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.8 8,453 reviews		Search Delta flights

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SeaTac

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Renton

Olympia

Lynnwood

Redmond

Kent

Lakewood

Puyallup

Tukwila

Cle Elum

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Fife

Marysville

Centralia

Kirkland

Shoreline

Westport

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.