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Duluth

$378+ Cheap flights from Seattle to Duluth (SEA - DLH)

SEA — DLH
Dec 10 — Dec 171
Thu 12/10
Thu 12/17
1 adult, Economy
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Cheap flight deals from Seattle to Duluth

Cheapest flights from Seattle to Duluth

Thu 11/121:50 pm -
1 stop7h 05m
Tue 11/175:04 am -
1 stop7h 38m
Deal found 11/9$548
Fri 11/67:35 pm -
2 stops13h 04m
Fri 11/136:23 am -
1 stop7h 56m
Deal found 11/5$554
Tue 11/248:18 pm -
2 stops12h 23m
Sat 11/286:23 am -
1 stop7h 56m
Deal found 11/9$603
Wed 11/116:00 am -
1 stop7h 45m
Tue 11/175:04 am -
1 stop7h 38m
Deal found 11/8$623
Fri 11/61:42 pm -
1 stop7h 15m
Fri 11/135:04 am -
1 stop7h 38m
Deal found 11/5$628
Wed 11/119:05 am -
2 stops12h 09m
Tue 11/176:23 am -
1 stop7h 56m
Deal found 11/8$664
Mon 11/2310:56 pm -
1 stop9h 45m
Fri 11/276:23 am -
1 stop7h 56m
Deal found 11/8$672

Find flight deals from Seattle to Duluth

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$378
(United Airlines)

Popular in

June

Cheapest in

December

Average price

$438
Provider with most accurate pricing for Seattle/Tacoma Intl-Duluth Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Duluth Intl flights.
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From Seattle/Tacoma Intl to Duluth Intl
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Highest demand for flights based on searches. 22% potential increase in price ($134 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in November 2026
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Cheapflights Fare Finder

 
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 Seattle/Tacoma Intl - DLH Duluth Intl

SEADLH

Seattle/Tacoma Intl

Sat 1/23

10:52 am-9:50 pm

1 stop8h 58m

Duluth Intl

Fri 1/29

5:50 am-11:47 am

1 stop7h 57m

$378

SeattleDuluth

SEA Seattle/Tacoma Intl - DLH Duluth Intl

SEADLH

Seattle/Tacoma Intl

Wed 1/27

8:30 am-11:28 pm

2 stops12h 58m

Duluth Intl

Tue 2/2

5:50 am-11:58 am

1 stop8h 08m

$384

SeattleDuluth

SEA Seattle/Tacoma Intl - DLH Duluth Intl

SEADLH

Seattle/Tacoma Intl

Thu 1/21

8:30 am-11:28 pm

2 stops12h 58m

Duluth Intl

Sun 1/24

5:50 am-11:47 am

1 stop7h 57m

$398

SeattleDuluth

SEA Seattle/Tacoma Intl - DLH Duluth Intl

SEADLH

Seattle/Tacoma Intl

Thu 1/21

10:21 am-11:28 pm

2 stops11h 07m

Duluth Intl

Mon 1/25

2:59 pm-12:45 am

2 stops11h 46m

$424

SeattleDuluth

SEA Seattle/Tacoma Intl - DLH Duluth Intl

SEADLH

Seattle/Tacoma Intl

Wed 2/3

10:52 am-9:50 pm

1 stop8h 58m

Duluth Intl

Sat 2/6

5:50 am-11:58 am

1 stop8h 08m

$488

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/7

Sorted by cheapest first

Compare providers for flights from Seattle to Duluth

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Duluth in November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Duluth flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Duluth flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Duluth flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Duluth flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Duluth flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Duluth

Have a flexible travel schedule? Discover the best time to fly to Duluth from Seattle with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Seattle to Duluth

What is the cheapest month to book a flight from Seattle to Duluth?

Currently, December is the cheapest month in which you can book a flight from Seattle to Duluth (average of $293). Flying from Seattle to Duluth in June is currently the most expensive (average of $838). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Duluth

See what other customers who have flown with Delta and United Airlines from Seattle to Duluth have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,700 reviews

Entertainment

7.8

Overall

7.8

Crew

8.5

Comfort

7.8

Boarding

8.1

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,700 reviews
Delta
7.8
Good
8,700 reviews

Entertainment

7.8

Overall

7.8

Crew

8.5

Comfort

7.8

Boarding

8.1

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.3
Good
10,476 reviews
Delta
7.8
Good
8,700 reviews

Entertainment

7.8

Overall

7.8

Crew

8.5

Comfort

7.8

Boarding

8.1

Food

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

Related info for your journey

  • How long is the flight from Seattle to Duluth?

    For as low as $378, United Airlines can have you in Duluth from Seattle in 8h 58m. Seattle and Duluth are separated by a distance of 1406 mi.

  • What are the cheapest airlines flying from Seattle to Duluth round-trip?

    According to our current data, Delta ($272), and United Airlines ($342) offers the cheapest pricing from Seattle to Duluth. You may be able to fly from Seattle to Duluth for 42% less than the average price by searching for these airlines.

  • Can I find deals for flights from Seattle to Duluth that include hotel bookings?

    Yes. In addition to deals on Seattle to Duluth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Duluth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Duluth.

  • Can I find deals for business class flights from Seattle to Duluth?

    Yes. Cheapflights offers flight deals from Seattle to Duluth by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Duluth?

    Currently, December is the cheapest month in which you can book a flight from Seattle to Duluth (average of $293). Flying from Seattle to Duluth in June is currently the most expensive (average of $838). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Duluth?

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

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Top 2 airlines flying from Seattle to Duluth

AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$272Average$505FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$342Average$479FlexibilityNo cancel feeOn-time69%

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