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$296+ Cheap flights from Duluth to Seattle (DLH - SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SEA
Dec 11 — Dec 181
Thu 12/11
Thu 12/18
1 adult, Economy
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Find 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 November 11, 2025.

This Delta deal was found by Cheapflights users on 11/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:24 pmDLH - SEA
1 stop6h 11mDelta
Wed 12/176:00 amSEA - DLH
1 stop7h 44mDelta
Deal found 11/10$353
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Mon 11/2411:14 amDLH - SEA
1 stop9h 38mUnited Airlines
Wed 11/265:20 pmSEA - DLH
2 stops15h 18mUnited Airlines
Deal found 11/10$580
This United Airlines deal was found by Cheapflights users on 11/10. 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 12/107:55 amDLH - SEA
2 stops16h 35mUnited Airlines
Wed 12/177:00 amSEA - DLH
1 stop29h 28mUnited Airlines
Deal found 11/10$581
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:01 pmDLH - SEA
1 stop6h 59mDelta
Thu 12/186:00 amSEA - DLH
1 stop7h 44mDelta
Deal found 11/11$593
This United Airlines deal was found by Cheapflights users on 11/10. 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.
Fri 12/52:57 pmDLH - SEA
1 stop9h 31mUnited Airlines
Sun 12/147:00 amSEA - DLH
2 stops12h 59mUnited Airlines
Deal found 11/10$599

Cheap 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 November 11, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$296
(United Airlines)

Popular in

August

Cheapest in

September

Average price

$441
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
Highest demand for flights based on searches. 0% potential increase in price ($2 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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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 November 11, 2025.
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

Thu 1/29

7:40 am-4:01 pm

1 stop10h 21m

Seattle/Tacoma Intl

Mon 2/2

9:00 am-9:59 pm

2 stops10h 59m

$296

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 2/5

4:41 pm-8:46 pm

1 stop6h 05m

Seattle/Tacoma Intl

Mon 2/9

6:05 am-4:01 pm

1 stop7h 56m

$323

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 1/7

4:41 pm-8:46 pm

1 stop6h 05m

Seattle/Tacoma Intl

Mon 1/12

6:05 am-4:01 pm

1 stop7h 56m

$323

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 12/10

4:24 pm-8:35 pm

1 stop6h 11m

Seattle/Tacoma Intl

Wed 12/17

6:00 am-3:44 pm

1 stop7h 44m

$353

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 1/7

3:05 pm-12:59 am

2 stops11h 54m

Seattle/Tacoma Intl

Mon 1/12

9:00 am-9:59 pm

2 stops10h 59m

$368

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 2/5

7:40 am-4:01 pm

1 stop10h 21m

Seattle/Tacoma Intl

Mon 2/9

11:45 pm-2:30 pm

2 stops12h 45m

$483

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Duluth-Seattle flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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, May is the cheapest month in which you can book a flight from Duluth to Seattle (average of $119). Flying from Duluth to Seattle in June is currently the most expensive (average of $409). 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 Duluth to Seattle?

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 November 11, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and Sun Country Air 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
8,008 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Food

7.3

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Food

7.3

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
9,015 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Food

7.3

Reviews

1 / 20
8.0
Excellent

Rona,Feb 2024

MSP - DEN

It was a good experience other than a short delay.
Sun Country Air
6.9
Okay
336 reviews
Delta
7.9
Good
8,008 reviews

Boarding

8.1

Crew

8.5

Comfort

7.9

Overall

7.9

Entertainment

7.9

Food

7.3

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 6h 05m. United Airlines provides one of the quickest options available for as low as $323. 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 $93, Sun Country Air will fly you from Duluth to Seattle and back. In addition to Sun Country Air, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Delta and United Airlines - these airlines can fly you to your destination from $258 and $258, respectively. Sun Country Air is 77% 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, May is the cheapest month in which you can book a flight from Duluth to Seattle (average of $119). Flying from Duluth to Seattle in June is currently the most expensive (average of $409). 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
SeaTac
Tacoma
Tukwila
Lakewood
Olympia
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Kirkland
Lacey
Kent
Cle Elum
Marysville
Puyallup
Federal Way
Fife
Issaquah
Aberdeen

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Top 3 airlines flying from Duluth to Seattle

Discover the top 3 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 November 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$93Average$221FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$258Average$411FlexibilityNo cancel feeOn-time69%
DeltaCheapest$258Average$401FlexibilityNo cancel feeOn-timeN/A

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