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$323+ Cheap flights from Duluth to Seattle (DLH - SEA)

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 9/26. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SEA
Sep 16 — Sep 231
Wed 9/16
Wed 9/23
1 adult, Economy
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Cheap flight deals from Duluth to Seattle

Cheapest flights from Duluth to Seattle
Explore the most affordable flight options available from Duluth to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 17, 2026.

This United Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 10/177:45 am -
1 stop10h 20m
Sat 10/241:56 pm -
1 stop7h 26m
Deal found 8/13$328
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Mon 10/53:10 pm -
1 stop9h 43m
Mon 10/1211:13 pm -
1 stop9h 29m
Deal found 8/13$347
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 9/53:11 pm -
1 stop9h 32m
Sat 9/129:00 am -
2 stops12h 20m
Deal found 8/13$352
This United Airlines deal was found by Cheapflights users on 8/17. 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.
Wed 9/303:10 pm -
1 stop9h 46m
Mon 10/511:13 pm -
1 stop9h 29m
Deal found 8/17$418
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/911:18 am -
2 stops11h 25m
Sat 9/129:00 am -
2 stops12h 20m
Deal found 8/12$439
This Delta deal was found by Cheapflights users on 8/14. 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.
Tue 9/14:11 pm -
1 stop7h 49m
Sat 9/512:10 pm -
1 stop5h 34m
Deal found 8/14$443
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Mon 12/213:22 pm -
1 stop9h 21m
Sun 2/1411:50 pm -
1 stop8h 52m
Deal found 8/15$444
This United Airlines deal was found by Cheapflights users on 8/15. 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 9/17:45 am -
1 stop10h 22m
Sat 9/511:00 pm -
1 stop9h 42m
Deal found 8/15$453

Find flight deals from Duluth to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Duluth (DLH) to Seattle (SEA). 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 August 17, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$328
(United Airlines)

One-way from

$323
(United Airlines)
Provider with most accurate pricing for Duluth Intl-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Duluth Intl-Seattle/Tacoma Intl flights.
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From Duluth Intl to Seattle/Tacoma Intl
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One-way flight from Duluth Intl to Seattle/Tacoma Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Duluth to Seattle 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 August 17, 2026.
Use the filters below to find and compare flights from Duluth to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Mon 10/5

3:10 pm-10:53 pm

1 stop9h 43m

Seattle/Tacoma Intl

Mon 10/12

11:13 pm-10:42 am

1 stop9h 29m

$347

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Wed 9/30

3:10 pm-10:56 pm

1 stop9h 46m

Seattle/Tacoma Intl

Mon 10/5

11:13 pm-10:42 am

1 stop9h 29m

$418

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sat 10/17

7:45 am-4:05 pm

1 stop10h 20m

Seattle/Tacoma Intl

Sat 10/24

1:56 pm-11:22 pm

1 stop7h 26m

$418

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Tue 9/1

7:45 am-4:14 pm

2 stops10h 29m

Seattle/Tacoma Intl

Sat 9/5

11:00 pm-10:42 am

1 stop9h 42m

$459
Quickest round-trip

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Thu 12/24

4:15 pm-8:27 pm

1 stop6h 12m

Seattle/Tacoma Intl

Mon 2/15

6:05 am-3:44 pm

1 stop7h 39m

$518
Cheapest one-way
Quickest one-way

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Thu 12/24

4:15 pm-8:27 pm

1 stop6h 12m

$354

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sun 12/20

3:22 pm-10:43 pm

1 stop9h 21m

$423

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sun 9/13

6:24 pm-7:14 pm

1 stop26h 50m

$442

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Wed 12/23

7:00 am-10:43 pm

1 stop17h 43m

$472

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sat 9/26

3:10 pm-11:46 am

2 stops22h 36m

$477

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 12 resultsSorted by cheapest first
1
2

Compare providers for flights from Duluth to Seattle

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 Duluth to Seattle in August.
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 Duluth-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Duluth-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Duluth-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Duluth-Seattle 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 Duluth-Seattle 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 Duluth to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Duluth 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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated August 17, 2026.
Read reviews from past customers who have flown Delta and United Airlines from Duluth to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,503 reviews

Entertainment

7.8

Boarding

8.1

Overall

7.8

Food

7.2

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.
Delta
7.8
Good
8,503 reviews
Delta
7.8
Good
8,503 reviews

Entertainment

7.8

Boarding

8.1

Overall

7.8

Food

7.2

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.
United Airlines
7.4
Good
10,106 reviews
Delta
7.8
Good
8,503 reviews

Entertainment

7.8

Boarding

8.1

Overall

7.8

Food

7.2

Crew

8.5

Comfort

7.8

Reviews

1 / 20
8.0
Excellent

Lesley,Aug 2023

LIH - SEA

It was a red eye flight . And after take off and the first service the flight attendants were no where to be found except in the galley. When I went to the bathroom, the entrance was blocked by a FA sitting and he basically exhaled loudly as he had to move his legs so I could get in. Never mind I was a comfort plus passenger and traveled to the back of the plane to go to the bathroom. I know I can go up to first class because there are no rules to prohibit me but it followed the “air” rules and was the flight attendants were rude as if I was putting them out. I will always fly delta but get your crew in check. I’m a former flight attendant and the crew is not priviledged. They are hired and paid to do a service.

Related info for your journey

Find useful and relevant information for your journey from Duluth to Seattle. 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 Duluth to Seattle?

    A quick flight from Duluth to Seattle can take about 9h 43m. United Airlines provides one of the quickest options available for as low as $347. There are 1406 mi between Duluth and Seattle.

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

    Currently priced at $258, United Airlines will fly you from Duluth to Seattle and back. In addition to United Airlines, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on Delta for as low as $303.

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

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

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

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

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

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

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Lynnwood
Tumwater
Centralia
Puyallup
Marysville
Kent
Ellensburg
Fife
Ocean Shores
Lakewood
Poulsbo

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Duluth to Seattle

Discover the top 2 airlines that operate flights from Duluth to Seattle. 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 August 17, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$258Average$431FlexibilityNo cancel feeOn-time69%
DeltaCheapest$303Average$417FlexibilityNo cancel feeOn-timeN/A

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