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$153+ 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SEA
Mar 16 — Mar 231
Mon 3/16
Mon 3/23
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 February 14, 2026.

This United Airlines deal was found by Cheapflights users on 2/10. 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 4/2211:19 am
DLH
-
SEA
1 stop9h 41m
United Airlines
Sun 4/2610:35 pm
SEA
-
DLH
1 stop9h 54m
United Airlines
Deal found 2/10$278
This United Airlines deal was found by Cheapflights users on 2/13. 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 2/283:19 pm
DLH
-
SEA
1 stop9h 24m
United Airlines
Wed 3/411:59 pm
SEA
-
DLH
1 stop8h 44m
United Airlines
Deal found 2/13$328
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/2311:19 am
DLH
-
SEA
1 stop9h 41m
United Airlines
Sun 4/2610:35 pm
SEA
-
DLH
1 stop9h 54m
United Airlines
Deal found 2/10$358
This United Airlines deal was found by Cheapflights users on 2/10. 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 4/2211:19 am
DLH
-
SEA
2 stops11h 38m
United Airlines
Sat 4/257:00 am
SEA
-
DLH
1 stop9h 09m
United Airlines
Deal found 2/10$364
This United Airlines deal was found by Cheapflights users on 2/11. 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 2/2611:20 am
DLH
-
SEA
1 stop9h 43m
United Airlines
Mon 3/211:59 pm
SEA
-
DLH
1 stop8h 44m
United Airlines
Deal found 2/11$408
This United Airlines deal was found by Cheapflights users on 2/13. 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 5/76:24 pm
DLH
-
SEA
1 stop7h 33m
United Airlines
Sun 5/3111:52 pm
SEA
-
DLH
1 stop8h 51m
United Airlines
Deal found 2/13$442

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 February 14, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$278
(United Airlines)

One-way from

$153
(United Airlines)

Popular in

May

Cheapest in

September

Average price

$500
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.
Search Deals
From Duluth Intl to Seattle/Tacoma Intl
Search Deals
One-way flight from Duluth Intl to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($71 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

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 February 14, 2026.
Use the filters below to find and compare flights from Duluth to Seattle that are best for you.

Fly from

Duluth

Fly to

Seattle

Route

Depart

Return

Price

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 4/22

11:19 am-7:00 pm

1 stop9h 41m

Seattle/Tacoma Intl

Sun 4/26

10:35 pm-10:29 am

1 stop9h 54m

$278

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 2/28

3:19 pm-10:43 pm

1 stop9h 24m

Seattle/Tacoma Intl

Wed 3/4

11:59 pm-10:43 am

1 stop8h 44m

$328

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 4/22

3:08 pm-10:37 pm

1 stop9h 29m

Seattle/Tacoma Intl

Sat 4/25

7:00 am-6:09 pm

1 stop9h 09m

$358

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 4/23

6:42 pm-12:19 am

1 stop7h 37m

Seattle/Tacoma Intl

Sat 4/25

7:00 am-6:09 pm

1 stop9h 09m

$358

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 2/26

11:20 am-7:03 pm

1 stop9h 43m

Seattle/Tacoma Intl

Mon 3/2

11:59 pm-10:43 am

1 stop8h 44m

$408

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 4/28

11:19 am-7:00 pm

1 stop9h 41m

$153

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 4/23

6:42 pm-12:19 am

1 stop7h 37m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/13

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 February.
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.

Cheapflights Insights

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

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

Currently, September is the cheapest month in which you can book a flight from Duluth to Seattle (average of $117). Flying from Duluth to Seattle in February is currently the most expensive (average of $500). 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 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 February 14, 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
7.9
Good
8,203 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Rona,Feb 2024

MSP - DEN

It was a good experience other than a short delay.
Delta
7.9
Good
8,203 reviews
Delta
7.9
Good
8,203 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Rona,Feb 2024

MSP - DEN

It was a good experience other than a short delay.
United Airlines
7.4
Good
9,289 reviews
Delta
7.9
Good
8,203 reviews

Food

7.2

Boarding

8.1

Entertainment

7.8

Crew

8.5

Overall

7.9

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Rona,Feb 2024

MSP - DEN

It was a good experience other than a short delay.

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 41m. United Airlines provides one of the quickest options available for as low as $278. There are 1406 mi between Duluth and Seattle.

  • 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. Delta is 40% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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.

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

    Currently, September is the cheapest month in which you can book a flight from Duluth to Seattle (average of $117). Flying from Duluth to Seattle in February is currently the most expensive (average of $500). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Edmonds
Lacey
Kent
Renton
Puyallup
Kirkland
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

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 February 14, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$258Average$411FlexibilityNo cancel feeOn-time69%
DeltaCheapest$258Average$453FlexibilityNo cancel feeOn-timeN/A

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