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Cheap flights from Seattle to Duluth from $300

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 9/23. 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 Seattle to Duluth (SEA-DLH)

Cheap round-trip flights

United Airlines Logo
11:54 pm - 10:45 amSEA-DLH
8h 51m1 stop
United Airlines Logo
9:45 am - 3:45 pmDLH-SEA
8h 00m1 stop
$300United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
United Airlines Logo
11:59 pm - 10:37 amSEA-DLH
8h 38m1 stop
United Airlines Logo
3:06 pm - 11:10 pmDLH-SEA
10h 04m2 stops
$302United Airlines
Find Deal
Mon, Nov 17 - Sat, Nov 22
United Airlines Logo
7:34 pm - 10:45 amSEA-DLH
13h 11m2 stops
United Airlines Logo
9:45 am - 3:45 pmDLH-SEA
8h 00m1 stop
$306United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
United Airlines Logo
7:28 pm - 10:37 amSEA-DLH
13h 09m2 stops
United Airlines Logo
3:06 pm - 11:10 pmDLH-SEA
10h 04m2 stops
$308United Airlines
Find Deal
Mon, Nov 17 - Sat, Nov 22
United Airlines Logo
11:40 pm - 10:45 amSEA-DLH
9h 05m1 stop
United Airlines Logo
3:07 pm - 10:30 pmDLH-SEA
9h 23m1 stop
$333United Airlines
Find Deal
Sat, Oct 11 - Thu, Oct 16
United Airlines Logo
5:31 pm - 10:45 amSEA-DLH
15h 14m2 stops
United Airlines Logo
3:07 pm - 10:30 pmDLH-SEA
9h 23m1 stop
$363United Airlines
Find Deal
Sat, Oct 11 - Thu, Oct 16
United Airlines Logo
7:34 pm - 10:45 amSEA-DLH
13h 11m2 stops
United Airlines Logo
9:45 am - 9:53 pmDLH-SEA
14h 08m2 stops
$393United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
United Airlines Logo
7:34 pm - 10:45 amSEA-DLH
13h 11m2 stops
United Airlines Logo
8:00 am - 9:15 pmDLH-SEA
15h 15m3 stops
$438United Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
Delta Logo
11:55 pm - 10:15 amSEA-DLH
8h 20m1 stop
Delta Logo
7:50 am - 12:24 pmDLH-SEA
6h 34m1 stop
$647Delta
Find Deal
Sun, Sep 7 - Thu, Sep 11
Delta Logo
12:59 am - 11:08 amSEA-DLH
8h 09m1 stop
Delta Logo
4:00 pm - 8:40 pmDLH-SEA
6h 40m1 stop
$757Delta
Find Deal
Sun, Dec 21 - Thu, Jan 1

Delta flights from Seattle to Duluth

Our best Delta deals on Seattle to Duluth flight tickets
Delta
Sep 7
SEA11:55 pmSeattle/Tacoma Intl
8h 20m
1 stop
DLH10:15 amDuluth Intl
Sep 11
DLH7:50 amDuluth Intl
6h 34m
1 stop
SEA12:24 pmSeattle/Tacoma Intl
$647
Find similar
Delta
Dec 21
SEA12:59 amSeattle/Tacoma Intl
8h 09m
1 stop
DLH11:08 amDuluth Intl
Jan 1
DLH4:00 pmDuluth Intl
6h 40m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$757
Find similar
Delta
Dec 21
SEA12:59 amSeattle/Tacoma Intl
8h 09m
1 stop
DLH11:08 amDuluth Intl
Jan 1
DLH5:00 amDuluth Intl
11h 29m
2 stops
SEA2:29 pmSeattle/Tacoma Intl
$846
Find similar

United Airlines flights from Seattle to Duluth

Our best United Airlines deals on Seattle to Duluth flight tickets
United Airlines
Sep 23
SEA11:54 pmSeattle/Tacoma Intl
8h 51m
1 stop
DLH10:45 amDuluth Intl
Sep 30
DLH9:45 amDuluth Intl
8h 00m
1 stop
SEA3:45 pmSeattle/Tacoma Intl
$300
Find similar
United Airlines
Nov 17
SEA11:59 pmSeattle/Tacoma Intl
8h 38m
1 stop
DLH10:37 amDuluth Intl
Nov 22
DLH3:06 pmDuluth Intl
10h 04m
2 stops
SEA11:10 pmSeattle/Tacoma Intl
$302
Find similar
United Airlines
Sep 23
SEA7:34 pmSeattle/Tacoma Intl
13h 11m
2 stops
DLH10:45 amDuluth Intl
Sep 30
DLH9:45 amDuluth Intl
8h 00m
1 stop
SEA3:45 pmSeattle/Tacoma Intl
$306
Find similar

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 August 25, 2025.
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

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 9/23

11:54 pm-10:45 am

1 stop8h 51m

Duluth Intl

Tue 9/30

9:45 am-3:45 pm

1 stop8h 00m

$300

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Mon 11/17

11:59 pm-10:37 am

1 stop8h 38m

Duluth Intl

Sat 11/22

3:06 pm-11:10 pm

2 stops10h 04m

$302

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 9/23

7:34 pm-10:45 am

2 stops13h 11m

Duluth Intl

Tue 9/30

9:45 am-3:45 pm

1 stop8h 00m

$306

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Mon 11/17

7:28 pm-10:37 am

2 stops13h 09m

Duluth Intl

Sat 11/22

3:06 pm-11:10 pm

2 stops10h 04m

$308

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 10/11

11:40 pm-10:45 am

1 stop9h 05m

Duluth Intl

Thu 10/16

3:07 pm-10:30 pm

1 stop9h 23m

$333

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 10/11

5:31 pm-10:45 am

2 stops15h 14m

Duluth Intl

Thu 10/16

3:07 pm-10:30 pm

1 stop9h 23m

$363

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 9/23

7:34 pm-10:45 am

2 stops13h 11m

Duluth Intl

Tue 9/30

9:45 am-9:53 pm

2 stops14h 08m

$393

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 9/23

7:34 pm-10:45 am

2 stops13h 11m

Duluth Intl

Tue 9/30

8:00 am-9:15 pm

3 stops15h 15m

$438

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sun 9/7

11:55 pm-10:15 am

1 stop8h 20m

Duluth Intl

Thu 9/11

7:50 am-12:24 pm

1 stop6h 34m

$647

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sun 12/21

12:59 am-11:08 am

1 stop8h 09m

Duluth Intl

Thu 1/1

4:00 pm-8:40 pm

1 stop6h 40m

$757

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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 cheapest month to fly to Duluth?

The cheapest month to fly to Duluth from Seattle is in November. Flight prices, which tend to average around $129, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Duluth from Seattle during March instead. Flights to Duluth in March, while not as cheap as those in November, still average around $295.

What is the cheapest day to depart on your flight to Duluth?

The cheapest day to depart from Seattle to Duluth is on a Wednesday when prices can be found for as low as $438. On the other hand, Friday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $698.

What is the cheapest time of day to depart on your flight to Duluth?

Flying to Duluth from Seattle in the morning is the least expensive time of day to depart. momondo users have found prices as low as $428 when looking at flights departing in the morning. In contrast, the most expensive time of day to depart to Duluth is at noon when prices are around $677.

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

Direct flights

None
There are no direct flights from Seattle to Duluth. There are no popular flight routes from Seattle to Duluth.
Search flight deals

  • 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. 7h 05m 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
7.9
7,981 reviews
Search Delta flights
United AirlinesPriceFrom $318Free CancellationRating
7.4
8,940 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
Hayward
Superior
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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