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Duluth

$318+ Cheap flights from Seattle to Duluth (SEA - DLH)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/28. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Aug 20 — Aug 271
Thu 8/20
Thu 8/27
1 adult, Economy
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Cheap flight deals from Seattle to Duluth

Cheapest flights from Seattle to Duluth
Explore the most affordable flight options available from Seattle to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 21, 2026.

This United Airlines deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/611:13 pm
SEA
-
DLH
1 stop9h 27m
United Airlines
Tue 10/203:10 pm
DLH
-
SEA
1 stop9h 46m
United Airlines
Deal found 7/17$318
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:00 pm
SEA
-
DLH
1 stop9h 42m
United Airlines
Tue 9/17:45 am
DLH
-
SEA
2 stops10h 29m
United Airlines
Deal found 7/16$324
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2811:00 pm
SEA
-
DLH
1 stop9h 42m
United Airlines
Wed 9/211:18 am
DLH
-
SEA
2 stops12h 40m
United Airlines
Deal found 7/16$423
This United Airlines deal was found by Cheapflights users on 7/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:00 am
SEA
-
DLH
1 stop8h 34m
United Airlines
Tue 9/17:45 am
DLH
-
SEA
2 stops12h 44m
United Airlines
Deal found 7/16$449
This Delta deal was found by Cheapflights users on 7/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/247:30 am
SEA
-
DLH
2 stops13h 05m
Delta
Mon 9/2811:43 am
DLH
-
SEA
1 stop7h 02m
Delta
Deal found 7/19$451
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/127:25 am
SEA
-
DLH
2 stops13h 16m
Delta
Sun 8/235:15 am
DLH
-
SEA
1 stop5h 33m
Delta
Deal found 7/17$456
This Delta deal was found by Cheapflights users on 7/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/109:45 pm
SEA
-
DLH
2 stops15h 46m
Delta
Tue 8/185:15 am
DLH
-
SEA
1 stop5h 33m
Delta
Deal found 7/17$472

Find flight deals from Seattle to Duluth

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Duluth (DLH). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 21, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(United Airlines)

One-way from

$318
(Delta)

Popular in

June

Cheapest in

February

Average price

$778
Provider with most accurate pricing for Seattle/Tacoma Intl-Duluth Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Duluth Intl flights.
Search Deals
From Seattle/Tacoma Intl to Duluth Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to Duluth Intl
Search Deals
Highest demand for flights based on searches. 27% potential increase in price ($195 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated July 21, 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

Thu 9/24

7:30 am-10:35 pm

2 stops13h 05m

Duluth Intl

Mon 9/28

11:43 am-4:45 pm

1 stop7h 02m

$451

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

Mon 8/10

9:45 pm-3:31 pm

2 stops15h 46m

Duluth Intl

Tue 8/18

5:15 am-8:48 am

1 stop5h 33m

$472

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 8/14

9:45 pm-10:41 pm

2 stops22h 56m

Duluth Intl

Sun 8/23

5:15 am-8:48 am

1 stop5h 33m

$472

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 9/24

6:43 pm-10:40 am

2 stops13h 57m

Duluth Intl

Mon 9/28

6:00 am-8:37 pm

2 stops16h 37m

$605

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 8/12

7:15 am-10:41 pm

2 stops13h 26m

Duluth Intl

Mon 8/24

8:18 am-11:54 pm

1 stop17h 36m

$640

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 8/14

11:59 pm-7:44 pm

1 stop17h 45m

Duluth Intl

Thu 8/20

5:15 am-11:59 pm

2 stops20h 44m

$660

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 8/27

1:57 pm-11:22 pm

1 stop7h 25m

Duluth Intl

Tue 9/1

7:45 am-7:07 pm

1 stop13h 22m

$688
Quickest round-trip

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sun 9/13

6:00 am-3:29 pm

1 stop7h 29m

Duluth Intl

Wed 9/16

4:11 pm-8:36 pm

1 stop6h 25m

$708

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 10/8

9:55 am-10:47 pm

2 stops10h 52m

Duluth Intl

Sun 10/11

4:21 pm-8:50 pm

1 stop6h 29m

$735

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/20

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from Seattle to Duluth

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Duluth in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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, February is the cheapest month in which you can book a flight from Seattle to Duluth (average of $340). 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.

How much does it cost to fly round-trip from Seattle to Duluth?

Reviews of airlines servicing Duluth

Get insights into the airlines that provide service to Duluth. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Duluth. Reviews last updated July 21, 2026.
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
8,472 reviews

Overall

7.8

Comfort

7.8

Food

7.2

Crew

8.5

Entertainment

7.8

Boarding

8.1

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
8,472 reviews
Delta
7.8
Good
8,472 reviews

Overall

7.8

Comfort

7.8

Food

7.2

Crew

8.5

Entertainment

7.8

Boarding

8.1

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
7.4
Good
10,011 reviews
Delta
7.8
Good
8,472 reviews

Overall

7.8

Comfort

7.8

Food

7.2

Crew

8.5

Entertainment

7.8

Boarding

8.1

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

Find useful and relevant information for your journey from Seattle to Duluth. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Duluth?

    For as low as $460, Delta can have you in Duluth from Seattle in 10h 34m. Seattle and Duluth are separated by a distance of 1406 mi. This flight may include one or multiple stops.

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

    According to our current data, Delta ($258), and United Airlines ($278) offers the cheapest pricing from Seattle to Duluth. You may be able to fly from Seattle to Duluth for 49% 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, February is the cheapest month in which you can book a flight from Seattle to Duluth (average of $340). 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

Discover the top 2 airlines that operate flights from Seattle to Duluth. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$492FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$278Average$480FlexibilityNo cancel feeOn-time69%

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