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Cheap flights from Seattle to Duluth from $328

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Duluth departing on 9/6. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Duluth

Cheap round-trip flights

Enter your travel dates to find the best prices.
Delta Logo
6:05 am - 3:31 pm
SEA
-
DLH
7h 26m
1 stop
Delta Logo
4:11 pm - 8:36 pm
DLH
-
SEA
6h 25m
1 stop
$328Delta
Sun, Sep 6 - Mon, Sep 14
United Airlines Logo
8:33 am - 11:04 pm
SEA
-
DLH
12h 31m
2 stops
United Airlines Logo
7:35 am - 3:31 pm
DLH
-
SEA
9h 56m
1 stop
$334United Airlines
Tue, Nov 10 - Sat, Nov 14
United Airlines Logo
8:33 am - 11:04 pm
SEA
-
DLH
12h 31m
2 stops
United Airlines Logo
3:14 pm - 11:02 pm
DLH
-
SEA
9h 48m
2 stops
$339United Airlines
Tue, Nov 10 - Sat, Nov 14
United Airlines Logo
5:00 am - 5:34 pm
SEA
-
DLH
10h 34m
2 stops
United Airlines Logo
7:45 am - 4:14 pm
DLH
-
SEA
10h 29m
2 stops
$460United Airlines
Wed, Aug 26 - Tue, Sep 1
United Airlines Logo
1:57 pm - 11:22 pm
SEA
-
DLH
7h 25m
1 stop
United Airlines Logo
7:45 am - 8:43 pm
DLH
-
SEA
14h 58m
2 stops
$518United Airlines
Wed, Aug 26 - Tue, Sep 1
Delta Logo
6:00 am - 3:41 pm
SEA
-
DLH
7h 41m
1 stop
Delta Logo
12:30 pm - 4:57 pm
DLH
-
SEA
6h 27m
1 stop
$523Delta
Fri, Oct 9 - Fri, Oct 16
United Airlines Logo
11:14 pm - 2:29 pm
SEA
-
DLH
13h 15m
2 stops
United Airlines Logo
7:45 am - 8:37 pm
DLH
-
SEA
14h 52m
2 stops
$529United Airlines
Fri, Oct 9 - Fri, Oct 16
United Airlines Logo
11:14 pm - 2:29 pm
SEA
-
DLH
13h 15m
2 stops
United Airlines Logo
6:00 am - 11:27 am
DLH
-
SEA
7h 27m
1 stop
$532United Airlines
Fri, Oct 9 - Fri, Oct 16
United Airlines Logo
11:13 pm - 10:42 am
SEA
-
DLH
9h 29m
1 stop
United Airlines Logo
7:45 am - 8:37 pm
DLH
-
SEA
14h 52m
2 stops
$553United Airlines
Fri, Oct 9 - Fri, Oct 16
United Airlines Logo
11:14 pm - 2:29 pm
SEA
-
DLH
13h 15m
2 stops
United Airlines Logo
7:45 am - 8:37 pm
DLH
-
SEA
14h 52m
2 stops
$558United Airlines
Fri, Oct 9 - Fri, Oct 16

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Delta flights from Seattle to Duluth

Our best Delta deals on Seattle to Duluth flight tickets
Delta
Sep 6
SEA6:05 amSeattle/Tacoma Intl
7h 26m
1 stop
DLH3:31 pmDuluth Intl
Sep 14
DLH4:11 pmDuluth Intl
6h 25m
1 stop
SEA8:36 pmSeattle/Tacoma Intl
$328
Delta
Oct 9
SEA6:00 amSeattle/Tacoma Intl
7h 41m
1 stop
DLH3:41 pmDuluth Intl
Oct 16
DLH12:30 pmDuluth Intl
6h 27m
1 stop
SEA4:57 pmSeattle/Tacoma Intl
$518
Delta
Oct 9
SEA6:00 amSeattle/Tacoma Intl
7h 41m
1 stop
DLH3:41 pmDuluth Intl
Oct 16
DLH12:30 pmDuluth Intl
6h 27m
1 stop
SEA4:57 pmSeattle/Tacoma Intl
$523

United Airlines flights from Seattle to Duluth

Our best United Airlines deals on Seattle to Duluth flight tickets
United Airlines
Nov 10
SEA8:33 amSeattle/Tacoma Intl
12h 31m
2 stops
DLH11:04 pmDuluth Intl
Nov 14
DLH7:35 amDuluth Intl
9h 56m
1 stop
SEA3:31 pmSeattle/Tacoma Intl
$334
United Airlines
Nov 10
SEA8:33 amSeattle/Tacoma Intl
12h 31m
2 stops
DLH11:04 pmDuluth Intl
Nov 14
DLH3:14 pmDuluth Intl
9h 48m
2 stops
SEA11:02 pmSeattle/Tacoma Intl
$339
United Airlines
Aug 26
SEA5:00 amSeattle/Tacoma Intl
10h 34m
2 stops
DLH5:34 pmDuluth Intl
Sep 1
DLH7:45 amDuluth Intl
10h 29m
2 stops
SEA4:14 pmSeattle/Tacoma Intl
$468

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 July 25, 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
Quickest round-trip

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sun 9/6

6:05 am-3:31 pm

1 stop7h 26m

Duluth Intl

Mon 9/14

4:11 pm-8:36 pm

1 stop6h 25m

$328

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 11/10

8:33 am-11:04 pm

2 stops12h 31m

Duluth Intl

Sat 11/14

7:35 am-3:31 pm

1 stop9h 56m

$334

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 11/10

8:33 am-11:04 pm

2 stops12h 31m

Duluth Intl

Sat 11/14

3:14 pm-11:02 pm

2 stops9h 48m

$339

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 8/26

5:00 am-5:34 pm

2 stops10h 34m

Duluth Intl

Tue 9/1

7:45 am-4:14 pm

2 stops10h 29m

$460

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 8/26

1:57 pm-11:22 pm

1 stop7h 25m

Duluth Intl

Tue 9/1

7:45 am-8:43 pm

2 stops14h 58m

$518

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 10/9

6:00 am-3:41 pm

1 stop7h 41m

Duluth Intl

Fri 10/16

12:30 pm-4:57 pm

1 stop6h 27m

$523

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 10/9

11:14 pm-2:29 pm

2 stops13h 15m

Duluth Intl

Fri 10/16

7:45 am-8:37 pm

2 stops14h 52m

$529

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 10/9

11:14 pm-2:29 pm

2 stops13h 15m

Duluth Intl

Fri 10/16

6:00 am-11:27 am

1 stop7h 27m

$532

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 10/9

11:13 pm-10:42 am

1 stop9h 29m

Duluth Intl

Fri 10/16

7:45 am-8:37 pm

2 stops14h 52m

$553

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 10/9

11:14 pm-2:29 pm

2 stops13h 15m

Duluth Intl

Fri 10/16

7:45 am-8:37 pm

2 stops14h 52m

$558

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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?

Prices are currently low for flights on this route.

Typical prices usually range from $503 to $780.
The lowest price recently found on this route was $328.

What is the cheapest month to fly to Duluth?

The cheapest month to fly to Duluth from Seattle is in February. Flight prices, which tend to average around $340, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Duluth from Seattle during September instead. Flights to Duluth in September, while not as cheap as those in February, still average around $347.

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 34m

Direct flights

None
The fastest flight from Seattle to Duluth takes 6h 34m
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 34m 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
8,486 reviews
Search Delta flights
United AirlinesPriceFrom $278Free CancellationRating
7.4
10,034 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
Cloquet
Hayward

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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