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$268+ 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 7/22. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SEA
Jul 18 — Jul 251
Sat 7/18
Sat 7/25
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 June 18, 2026.

This United Airlines deal was found by Cheapflights users on 6/16. 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.
Sat 10/315:00 am
DLH
-
SEA
1 stop8h 40m
United Airlines
Tue 11/32:15 pm
SEA
-
DLH
1 stop8h 38m
United Airlines
Deal found 6/16$318
This United Airlines deal was found by Cheapflights users on 6/16. 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.
Tue 9/13:11 pm
DLH
-
SEA
1 stop9h 32m
United Airlines
Sat 9/511:00 pm
SEA
-
DLH
1 stop9h 42m
United Airlines
Deal found 6/16$408
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Thu 10/153:10 pm
DLH
-
SEA
1 stop9h 46m
United Airlines
Mon 10/1911:13 pm
SEA
-
DLH
1 stop9h 27m
United Airlines
Deal found 6/13$413
This United Airlines deal was found by Cheapflights users on 6/14. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/125:00 am
DLH
-
SEA
2 stops11h 18m
United Airlines
Mon 11/162:15 pm
SEA
-
DLH
1 stop8h 38m
United Airlines
Deal found 6/14$476
This United Airlines deal was found by Cheapflights users on 6/16. 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 9/93:10 pm
DLH
-
SEA
1 stop9h 35m
United Airlines
Mon 9/2111:00 pm
SEA
-
DLH
1 stop9h 42m
United Airlines
Deal found 6/16$478

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 June 18, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(United Airlines)

One-way from

$268
(Delta)
Provider with most accurate pricing for Duluth Intl-Seattle/Tacoma Intl flight deals.
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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 June 18, 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 - SEA

DLHSEA

Duluth Intl

Sat 10/31

5:00 am-11:40 am

1 stop8h 40m

Seattle/Tacoma Intl

Tue 11/3

2:15 pm-12:53 am

1 stop8h 38m

$318
Quickest round-trip

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 11/12

4:15 pm-8:27 pm

1 stop6h 12m

Seattle/Tacoma Intl

Mon 11/16

6:05 am-3:44 pm

1 stop7h 39m

$318

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 9/1

3:11 pm-10:43 pm

1 stop9h 32m

Seattle/Tacoma Intl

Sat 9/5

5:20 pm-10:42 am

2 stops15h 22m

$414

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 9/9

3:10 pm-10:45 pm

1 stop9h 35m

Seattle/Tacoma Intl

Mon 9/21

11:00 pm-10:42 am

1 stop9h 42m

$478
Cheapest one-way

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 7/24

5:00 am-8:45 am

1 stop5h 45m

$334

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 7/23

5:00 am-8:45 am

1 stop5h 45m

$334
Quickest one-way

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sun 8/30

5:15 am-8:48 am

1 stop5h 33m

$344

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 7/24

6:25 pm-8:00 am

2 stops15h 35m

$411

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 7/28

8:00 am-11:58 pm

1 stop17h 58m

$417

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 7/25

7:03 am-7:06 pm

1 stop14h 03m

$452

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 11 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 June.
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 June 18, 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
8,410 reviews

Food

7.2

Comfort

7.8

Entertainment

7.8

Crew

8.5

Overall

7.8

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
Delta
7.8
Good
8,410 reviews
Delta
7.8
Good
8,410 reviews

Food

7.2

Comfort

7.8

Entertainment

7.8

Crew

8.5

Overall

7.8

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,
United Airlines
7.4
Good
9,859 reviews
Delta
7.8
Good
8,410 reviews

Food

7.2

Comfort

7.8

Entertainment

7.8

Crew

8.5

Overall

7.8

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Rakshith,May 2026

TPE - SEA

I got middle seat, but it was cheap $340 for Taipei to PDX ,

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 6h 12m. United Airlines provides one of the quickest options available for as low as $318. There are 1406 mi between Duluth and Seattle. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

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

  • 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
Tacoma
Lacey
Ocean Shores
Leavenworth
Olympia
Edmonds
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Lynnwood
Renton
Ellensburg
Fife
Lakewood
Issaquah
Shoreline
Marysville

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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 June 18, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$258Average$411FlexibilityNo cancel feeOn-time69%
DeltaCheapest$258Average$396FlexibilityNo cancel feeOn-timeN/A

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