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Cheap flights from Seattle to Duluth from $263

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Duluth departing on 7/11. 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
1 adult, Economy, 0 bags

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Find the cheapest flights from Seattle to Duluth

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
1:45 pm - 11:38 pm
SEA
-
DLH
7h 53m
1 stop
Delta Logo
4:11 pm - 8:16 pm
DLH
-
SEA
6h 05m
1 stop
$383Delta
Wed, Sep 9 - Sat, Sep 19
United Airlines Logo
7:00 am - 5:34 pm
SEA
-
DLH
8h 34m
1 stop
United Airlines Logo
6:10 pm - 12:14 am
DLH
-
SEA
8h 04m
1 stop
$408United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
7:32 pm - 11:44 am
SEA
-
DLH
14h 12m
2 stops
United Airlines Logo
5:00 am - 11:40 am
DLH
-
SEA
8h 40m
1 stop
$414United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
5:20 pm - 10:42 am
SEA
-
DLH
15h 22m
2 stops
United Airlines Logo
3:10 pm - 10:45 pm
DLH
-
SEA
9h 35m
1 stop
$475United Airlines
Wed, Sep 9 - Sat, Sep 19
Delta Logo
6:05 am - 3:29 pm
SEA
-
DLH
7h 24m
1 stop
Delta Logo
4:11 pm - 8:16 pm
DLH
-
SEA
6h 05m
1 stop
$493Delta
Wed, Sep 16 - Sat, Sep 19
United Airlines Logo
7:32 pm - 11:44 am
SEA
-
DLH
14h 12m
2 stops
United Airlines Logo
5:00 am - 3:54 pm
DLH
-
SEA
12h 54m
2 stops
$518United Airlines
Sat, Oct 31 - Wed, Nov 4
United Airlines Logo
6:52 pm - 10:42 am
SEA
-
DLH
13h 50m
2 stops
United Airlines Logo
7:45 am - 8:18 pm
DLH
-
SEA
14h 33m
2 stops
$519United Airlines
Wed, Sep 9 - Sat, Sep 19
Delta Logo
2:30 pm - 10:41 pm
SEA
-
DLH
6h 11m
1 stop
Delta Logo
11:41 am - 5:00 pm
DLH
-
SEA
7h 19m
1 stop
$568Delta
Wed, Aug 26 - Tue, Sep 1
United Airlines Logo
8:10 am - 11:20 pm
SEA
-
DLH
13h 10m
2 stops
United Airlines Logo
3:11 pm - 10:43 pm
DLH
-
SEA
9h 32m
1 stop
$638United Airlines
Wed, Aug 26 - Tue, Sep 1
United Airlines Logo
11:04 pm - 2:29 pm
SEA
-
DLH
13h 25m
2 stops
United Airlines Logo
7:45 am - 8:18 pm
DLH
-
SEA
14h 33m
2 stops
$643United Airlines
Wed, Sep 16 - Sat, Sep 19

Delta flights from Seattle to Duluth

Our best Delta deals on Seattle to Duluth flight tickets
Delta
Sep 9
SEA1:45 pmSeattle/Tacoma Intl
7h 53m
1 stop
DLH11:38 pmDuluth Intl
Sep 19
DLH4:11 pmDuluth Intl
6h 05m
1 stop
SEA8:16 pmSeattle/Tacoma Intl
$383
Delta
Sep 16
SEA6:05 amSeattle/Tacoma Intl
7h 24m
1 stop
DLH3:29 pmDuluth Intl
Sep 19
DLH4:11 pmDuluth Intl
6h 05m
1 stop
SEA8:16 pmSeattle/Tacoma Intl
$493
Delta
Aug 26
SEA2:30 pmSeattle/Tacoma Intl
6h 11m
1 stop
DLH10:41 pmDuluth Intl
Sep 1
DLH11:41 amDuluth Intl
7h 19m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$568

United Airlines flights from Seattle to Duluth

Our best United Airlines deals on Seattle to Duluth flight tickets
United Airlines
Oct 31
SEA7:00 amSeattle/Tacoma Intl
8h 34m
1 stop
DLH5:34 pmDuluth Intl
Nov 4
DLH6:10 pmDuluth Intl
8h 04m
1 stop
SEA12:14 amSeattle/Tacoma Intl
$408
United Airlines
Oct 31
SEA7:32 pmSeattle/Tacoma Intl
14h 12m
2 stops
DLH11:44 amDuluth Intl
Nov 4
DLH5:00 amDuluth Intl
8h 40m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$414
United Airlines
Jun 11
SEA1:51 pmSeattle/Tacoma Intl
7h 32m
1 stop
DLH11:23 pmDuluth Intl
Jun 14
DLH11:18 amDuluth Intl
9h 47m
1 stop
SEA7:05 pmSeattle/Tacoma Intl
$467

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Duluth 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 June 5, 2026.
Use the filters below to find and compare flights from Seattle to Duluth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 9/9

1:45 pm-11:38 pm

1 stop7h 53m

Duluth Intl

Sat 9/19

4:11 pm-8:16 pm

1 stop6h 05m

$383

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 10/31

7:00 am-5:34 pm

1 stop8h 34m

Duluth Intl

Wed 11/4

6:10 pm-12:14 am

1 stop8h 04m

$408

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 10/31

7:32 pm-11:44 am

2 stops14h 12m

Duluth Intl

Wed 11/4

5:00 am-11:40 am

1 stop8h 40m

$414

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 9/9

5:20 pm-10:42 am

2 stops15h 22m

Duluth Intl

Sat 9/19

3:10 pm-10:45 pm

1 stop9h 35m

$475
Quickest round-trip

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 9/16

6:05 am-3:29 pm

1 stop7h 24m

Duluth Intl

Sat 9/19

4:11 pm-8:16 pm

1 stop6h 05m

$493

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 10/31

7:32 pm-11:44 am

2 stops14h 12m

Duluth Intl

Wed 11/4

5:00 am-3:54 pm

2 stops12h 54m

$518

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 9/9

6:52 pm-10:42 am

2 stops13h 50m

Duluth Intl

Sat 9/19

7:45 am-8:18 pm

2 stops14h 33m

$519

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 8/26

2:30 pm-10:41 pm

1 stop6h 11m

Duluth Intl

Tue 9/1

11:41 am-5:00 pm

1 stop7h 19m

$568

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 8/26

8:10 am-11:20 pm

2 stops13h 10m

Duluth Intl

Tue 9/1

3:11 pm-10:43 pm

1 stop9h 32m

$638

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 9/16

11:04 pm-2:29 pm

2 stops13h 25m

Duluth Intl

Sat 9/19

7:45 am-8:18 pm

2 stops14h 33m

$643

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first
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See travel insights to Duluth from

How to get the cheapest flight ticket from Seattle to Duluth

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 typical price of a round-trip flight between Seattle and Duluth?

What is the cheapest month to fly to Duluth?

The cheapest month to fly to Duluth from Seattle is in September. Flight prices, which tend to average around $302, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Duluth from Seattle during January instead. Flights to Duluth in January, while not as cheap as those in September, still average around $313.

When to book flights from Seattle to Duluth

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Duluth according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Duluth (SEA to DLH) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Duluth

Fastest flight time

6h 11m

Direct flights

None
The fastest flight from Seattle to Duluth takes 6h 11m
There are no direct flights from Seattle to Duluth. There are no popular flight routes from Seattle to Duluth.
Search flight deals

Frequently asked questions about flying from Seattle to Duluth

  • How far is Seattle/Tacoma Intl to Duluth Intl by plane?

    A flight from Seattle/Tacoma Intl to Duluth Intl will travel around 1410.5 mi. 6h 11m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Duluth Intl Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Duluth Intl Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Duluth Intl Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Duluth Intl Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Duluth Intl Airport.

  • What documentation or ID do you need to fly to Duluth Intl Airport?

    The necessary travel and health documents for your Duluth Intl Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Duluth?

Best airlines flying from Seattle to Duluth

Compare and see reviews for airlines that fly from Seattle to Duluth with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $258Free CancellationRating
7.8
8,395 reviews
Search Delta flights
United AirlinesPriceFrom $278Free CancellationRating
7.4
9,775 reviews
Search United Airlines flights

Traveling to a place near Duluth?

Book flights to Duluth if you plan to visit one of these locations
Two Harbors
Superior
Hayward
Cloquet

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Duluth. Millions of users trust and use momondo every year so you are in good hands.

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

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

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

Once all potential Seattle to Duluth flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Seattle to Duluth 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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