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Cheap flights from Duluth to Seattle from $153

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Duluth to Seattle departing on 4/28. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Duluth to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
3:19 pm - 10:43 pm
DLH
-
SEA
9h 24m
1 stop
United Airlines Logo
11:59 pm - 10:43 am
SEA
-
DLH
8h 44m
1 stop
$328United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
3:19 pm - 10:43 pm
DLH
-
SEA
9h 24m
1 stop
United Airlines Logo
6:04 pm - 10:43 am
SEA
-
DLH
14h 39m
2 stops
$334United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
11:20 am - 7:03 pm
DLH
-
SEA
9h 43m
1 stop
United Airlines Logo
7:00 am - 6:07 pm
SEA
-
DLH
9h 07m
1 stop
$353United Airlines
Thu, Mar 26 - Tue, Mar 31
United Airlines Logo
11:20 am - 7:03 pm
DLH
-
SEA
9h 43m
1 stop
United Airlines Logo
11:59 pm - 10:43 am
SEA
-
DLH
8h 44m
1 stop
$388United Airlines
Thu, Mar 26 - Thu, Mar 26
United Airlines Logo
6:10 pm - 11:59 pm
DLH
-
SEA
7h 49m
1 stop
United Airlines Logo
11:52 pm - 10:43 am
SEA
-
DLH
8h 51m
1 stop
$417United Airlines
Fri, May 29 - Tue, Jun 2
United Airlines Logo
3:19 pm - 12:59 am
DLH
-
SEA
11h 40m
2 stops
United Airlines Logo
6:04 pm - 10:43 am
SEA
-
DLH
14h 39m
2 stops
$419United Airlines
Sat, Feb 28 - Wed, Mar 4
United Airlines Logo
11:18 am - 9:59 pm
DLH
-
SEA
12h 41m
2 stops
United Airlines Logo
11:52 pm - 10:43 am
SEA
-
DLH
8h 51m
1 stop
$423United Airlines
Fri, May 29 - Tue, Jun 2
United Airlines Logo
11:20 am - 7:03 pm
DLH
-
SEA
9h 43m
1 stop
United Airlines Logo
7:37 pm - 10:39 am
SEA
-
DLH
13h 02m
2 stops
$432United Airlines
Thu, Mar 26 - Tue, Mar 31
United Airlines Logo
6:24 pm - 11:57 pm
DLH
-
SEA
7h 33m
1 stop
United Airlines Logo
11:52 pm - 10:43 am
SEA
-
DLH
8h 51m
1 stop
$442United Airlines
Thu, May 7 - Sun, May 31
United Airlines Logo
5:00 am - 2:36 pm
DLH
-
SEA
11h 36m
2 stops
United Airlines Logo
11:52 pm - 10:43 am
SEA
-
DLH
8h 51m
1 stop
$447United Airlines
Thu, May 7 - Sun, May 31

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets
United Airlines
Feb 28
DLH3:19 pmDuluth Intl
9h 24m
1 stop
SEA10:43 pmSeattle/Tacoma Intl
Mar 4
SEA11:59 pmSeattle/Tacoma Intl
8h 44m
1 stop
DLH10:43 amDuluth Intl
$328
United Airlines
Feb 28
DLH3:19 pmDuluth Intl
9h 24m
1 stop
SEA10:43 pmSeattle/Tacoma Intl
Mar 4
SEA6:04 pmSeattle/Tacoma Intl
14h 39m
2 stops
DLH10:43 amDuluth Intl
$334
United Airlines
Mar 26
DLH11:20 amDuluth Intl
9h 43m
1 stop
SEA7:03 pmSeattle/Tacoma Intl
Mar 31
SEA7:00 amSeattle/Tacoma Intl
9h 07m
1 stop
DLH6:07 pmDuluth Intl
$353

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets
Delta
May 30
DLH8:05 amDuluth Intl
14h 38m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
Jun 2
SEA4:46 pmSeattle/Tacoma Intl
4h 52m
1 stop
DLH11:38 pmDuluth Intl
$491
Delta
Aug 10
DLH5:10 amDuluth Intl
5h 40m
1 stop
SEA8:50 amSeattle/Tacoma Intl
Aug 18
SEA6:05 amSeattle/Tacoma Intl
7h 14m
1 stop
DLH3:19 pmDuluth Intl
$504
Delta
May 29
DLH5:10 amDuluth Intl
13h 38m
2 stops
SEA4:48 pmSeattle/Tacoma Intl
Jun 1
SEA6:10 amSeattle/Tacoma Intl
7h 09m
1 stop
DLH3:19 pmDuluth Intl
$531

momondo Fare Finder

 
Customize your flight search to find flights from Duluth to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated February 16, 2026.
Use the filters below to find and compare flights from Duluth to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 2/28

3:19 pm-10:43 pm

1 stop9h 24m

Seattle/Tacoma Intl

Wed 3/4

11:59 pm-10:43 am

1 stop8h 44m

$328

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 2/28

3:19 pm-10:43 pm

1 stop9h 24m

Seattle/Tacoma Intl

Wed 3/4

6:04 pm-10:43 am

2 stops14h 39m

$334

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 3/26

11:20 am-7:03 pm

1 stop9h 43m

Seattle/Tacoma Intl

Tue 3/31

7:00 am-6:07 pm

1 stop9h 07m

$353

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 3/26

11:20 am-7:03 pm

1 stop9h 43m

Seattle/Tacoma Intl

Thu 3/26

11:59 pm-10:43 am

1 stop8h 44m

$388

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 5/29

6:10 pm-11:59 pm

1 stop7h 49m

Seattle/Tacoma Intl

Tue 6/2

11:52 pm-10:43 am

1 stop8h 51m

$417

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 2/28

3:19 pm-12:59 am

2 stops11h 40m

Seattle/Tacoma Intl

Wed 3/4

6:04 pm-10:43 am

2 stops14h 39m

$419

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 5/29

11:18 am-9:59 pm

2 stops12h 41m

Seattle/Tacoma Intl

Tue 6/2

11:52 pm-10:43 am

1 stop8h 51m

$423

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 3/26

11:20 am-7:03 pm

1 stop9h 43m

Seattle/Tacoma Intl

Tue 3/31

7:37 pm-10:39 am

2 stops13h 02m

$432

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 5/7

6:24 pm-11:57 pm

1 stop7h 33m

Seattle/Tacoma Intl

Sun 5/31

11:52 pm-10:43 am

1 stop8h 51m

$442

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 5/7

5:00 am-2:36 pm

2 stops11h 36m

Seattle/Tacoma Intl

Sun 5/31

11:52 pm-10:43 am

1 stop8h 51m

$447

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

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 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

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?

  • 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?

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 AirlinesPriceFrom $258Free CancellationRating
7.4
9,299 reviews
Search United Airlines flights
DeltaPriceFrom $258Free CancellationRating
7.9
8,204 reviews
Search Delta flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Marysville
Redmond
Puyallup
Cle Elum
Lakewood
Tukwila
Federal Way
Kirkland
Westport
Centralia
Fife
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.

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