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Cheap flights from Duluth to Seattle from $317

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Duluth to Seattle departing on 3/20. 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
3:07 pm - 10:45 pm
DLH
-
SEA
9h 38m
1 stop
United Airlines Logo
11:59 pm - 10:43 am
SEA
-
DLH
8h 44m
1 stop
$317United Airlines
Fri, Mar 20 - Tue, Mar 24
United Airlines Logo
3:07 pm - 10:45 pm
DLH
-
SEA
9h 38m
1 stop
United Airlines Logo
5:20 pm - 10:43 am
SEA
-
DLH
15h 23m
2 stops
$323United Airlines
Fri, Mar 20 - Tue, Mar 24
Delta Logo
4:32 pm - 8:50 pm
DLH
-
SEA
6h 18m
1 stop
Delta Logo
3:30 pm - 10:47 pm
SEA
-
DLH
5h 17m
1 stop
$354Delta
Sat, Mar 21 - Wed, Mar 25
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
$356United Airlines
Tue, Feb 24 - Sat, Feb 28
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
$368United Airlines
Tue, Feb 24 - Sat, Feb 28
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
$384United Airlines
Wed, Feb 25 - Sat, Feb 28
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
$396United Airlines
Wed, Feb 25 - Sat, Feb 28
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
$401United Airlines
Tue, Feb 24 - Sat, Feb 28
United Airlines Logo
3:07 pm - 10:45 pm
DLH
-
SEA
9h 38m
1 stop
United Airlines Logo
11:59 pm - 10:43 am
SEA
-
DLH
8h 44m
1 stop
$402United Airlines
Sat, Mar 21 - Wed, Mar 25
United Airlines Logo
7:50 am - 8:56 pm
DLH
-
SEA
15h 06m
2 stops
United Airlines Logo
6:04 pm - 10:43 am
SEA
-
DLH
14h 39m
2 stops
$408United Airlines
Wed, Feb 25 - Sat, Feb 28

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets
Delta
Mar 21
DLH4:32 pmDuluth Intl
6h 18m
1 stop
SEA8:50 pmSeattle/Tacoma Intl
Mar 25
SEA3:30 pmSeattle/Tacoma Intl
5h 17m
1 stop
DLH10:47 pmDuluth Intl
$354
Delta
May 24
DLH4:20 pmDuluth Intl
6h 23m
1 stop
SEA8:43 pmSeattle/Tacoma Intl
Jun 4
SEA4:46 pmSeattle/Tacoma Intl
4h 52m
1 stop
DLH11:38 pmDuluth Intl
$410
Delta
Mar 1
DLH5:00 amDuluth Intl
7h 55m
1 stop
SEA10:55 amSeattle/Tacoma Intl
Mar 4
SEA3:30 pmSeattle/Tacoma Intl
6h 25m
1 stop
DLH11:55 pmDuluth Intl
$642

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets
United Airlines
Mar 20
DLH3:07 pmDuluth Intl
9h 38m
1 stop
SEA10:45 pmSeattle/Tacoma Intl
Mar 24
SEA11:59 pmSeattle/Tacoma Intl
8h 44m
1 stop
DLH10:43 amDuluth Intl
$317
United Airlines
Mar 20
DLH3:07 pmDuluth Intl
9h 38m
1 stop
SEA10:45 pmSeattle/Tacoma Intl
Mar 24
SEA5:20 pmSeattle/Tacoma Intl
15h 23m
2 stops
DLH10:43 amDuluth Intl
$323
United Airlines
Feb 24
DLH3:19 pmDuluth Intl
9h 24m
1 stop
SEA10:43 pmSeattle/Tacoma Intl
Feb 28
SEA11:59 pmSeattle/Tacoma Intl
8h 44m
1 stop
DLH10:43 amDuluth Intl
$356

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 10, 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

Fri 3/20

3:07 pm-10:45 pm

1 stop9h 38m

Seattle/Tacoma Intl

Tue 3/24

11:59 pm-10:43 am

1 stop8h 44m

$317

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 3/20

3:07 pm-10:45 pm

1 stop9h 38m

Seattle/Tacoma Intl

Tue 3/24

5:20 pm-10:43 am

2 stops15h 23m

$323

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 3/21

4:32 pm-8:50 pm

1 stop6h 18m

Seattle/Tacoma Intl

Wed 3/25

3:30 pm-10:47 pm

1 stop5h 17m

$354

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 2/24

3:19 pm-10:43 pm

1 stop9h 24m

Seattle/Tacoma Intl

Sat 2/28

11:59 pm-10:43 am

1 stop8h 44m

$356

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 2/24

3:19 pm-10:43 pm

1 stop9h 24m

Seattle/Tacoma Intl

Sat 2/28

6:04 pm-10:43 am

2 stops14h 39m

$368

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 2/25

3:19 pm-10:43 pm

1 stop9h 24m

Seattle/Tacoma Intl

Sat 2/28

11:59 pm-10:43 am

1 stop8h 44m

$384

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 2/25

3:19 pm-10:43 pm

1 stop9h 24m

Seattle/Tacoma Intl

Sat 2/28

6:04 pm-10:43 am

2 stops14h 39m

$396

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 2/24

3:19 pm-12:59 am

2 stops11h 40m

Seattle/Tacoma Intl

Sat 2/28

6:04 pm-10:43 am

2 stops14h 39m

$401

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 3/21

3:07 pm-10:45 pm

1 stop9h 38m

Seattle/Tacoma Intl

Wed 3/25

11:59 pm-10:43 am

1 stop8h 44m

$402

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 2/25

7:50 am-8:56 pm

2 stops15h 06m

Seattle/Tacoma Intl

Sat 2/28

6:04 pm-10:43 am

2 stops14h 39m

$408

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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

6h 13m

Direct flights

None
The fastest flight from Duluth to Seattle takes 6h 13m
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 13m, 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
9,267 reviews
Search United Airlines flights
DeltaPriceFrom $258Free CancellationRating
7.9
8,178 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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