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$193+ 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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SEA
Aug 24 — Aug 311
Sun 8/24
Sun 8/31
1 adult, Economy
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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 August 19, 2025.

Round-trip from

$332
(Delta)

One-way from

$193
(Delta)

Popular in

December

Cheapest in

September

Average price

$458
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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Highest demand for flights based on searches. 0% potential increase in price ($3 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 19, 2025.

This Delta deal was found by Cheapflights users on 8/18. 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 10/2912:02 pmDLH - SEA
1 stop6h 52mDelta
Mon 11/36:00 amSEA - DLH
1 stop7h 30mDelta
Deal found 8/18$332
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.
Thu 9/49:45 amDLH - SEA
2 stops14h 30mUnited Airlines
Mon 9/811:54 pmSEA - DLH
1 stop8h 51mUnited Airlines
Deal found 8/17$369
This United Airlines deal was found by Cheapflights users on 8/18. 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 10/233:07 pmDLH - SEA
1 stop9h 23mUnited Airlines
Sat 10/257:00 amSEA - DLH
1 stop9h 35mUnited Airlines
Deal found 8/18$382
This United Airlines deal was found by Cheapflights users on 8/19. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/1811:20 amDLH - SEA
1 stop9h 29mUnited Airlines
Tue 9/3011:40 pmSEA - DLH
1 stop9h 05mUnited Airlines
Deal found 8/19$422
This United Airlines deal was found by Cheapflights users on 8/18. 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 10/293:06 pmDLH - SEA
2 stops10h 04mUnited Airlines
Mon 11/37:28 pmSEA - DLH
2 stops13h 09mUnited Airlines
Deal found 8/18$433
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/95:10 amDLH - SEA
1 stop5h 38mDelta
Wed 9/1011:55 pmSEA - DLH
1 stop8h 12mDelta
Deal found 8/17$457

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 19, 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

Wed 10/29

12:02 pm-4:54 pm

1 stop6h 52m

Seattle/Tacoma Intl

Mon 11/3

6:00 am-3:30 pm

1 stop7h 30m

$332

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 9/4

9:45 am-10:15 pm

2 stops14h 30m

Seattle/Tacoma Intl

Mon 9/8

11:54 pm-10:45 am

1 stop8h 51m

$369

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 10/23

3:07 pm-10:30 pm

1 stop9h 23m

Seattle/Tacoma Intl

Sat 10/25

7:00 am-6:35 pm

1 stop9h 35m

$382

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 9/18

11:20 am-6:49 pm

1 stop9h 29m

Seattle/Tacoma Intl

Tue 9/30

11:40 pm-10:45 am

1 stop9h 05m

$422

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 10/29

11:14 am-9:13 pm

2 stops11h 59m

Seattle/Tacoma Intl

Mon 11/3

11:59 pm-10:37 am

1 stop8h 38m

$428

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 9/23

5:10 am-10:45 am

1 stop7h 35m

$193

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 9/23

3:10 pm-10:20 pm

1 stop9h 10m

$233

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/18

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, January is the cheapest month in which you can book a flight from Duluth to Seattle (average of $238). Flying from Duluth to Seattle in June is currently the most expensive (average of $388). 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 August 19, 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
8.0
Very good
7,981 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

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
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

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
8,922 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

Comfort

7.9

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
333 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Overall

8.0

Boarding

8.2

Crew

8.5

Food

7.3

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 6h 52m. Delta provides one of the quickest options available for as low as $332. 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 $248 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, January is the cheapest month in which you can book a flight from Duluth to Seattle (average of $238). Flying from Duluth to Seattle in June is currently the most expensive (average of $388). 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
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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Alternative routes for Duluth to Seattle

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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 August 19, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$93Average$221FlexibilityNo cancel feeOn-time83%
DeltaCheapest$248Average$407FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$258Average$426FlexibilityNo cancel feeOn-time69%

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