HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$223+ 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 10/16. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SEA
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Duluth to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 15, 2025.

Round-trip from

$323
(Delta)

One-way from

$223
(United Airlines)

Popular in

August

Cheapest in

September

Average price

$258
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. 2% potential increase in price ($8 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($14 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

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 September 15, 2025.

This Delta deal was found by Cheapflights users on 9/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:50 amDLH - SEA
1 stop7h 08mDelta
Sun 11/25:00 amSEA - DLH
1 stop7h 30mDelta
Deal found 9/15$323
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/283:06 pmDLH - SEA
1 stop9h 39mUnited Airlines
Sun 11/211:59 pmSEA - DLH
1 stop8h 38mUnited Airlines
Deal found 9/15$324
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Fri 10/1711:20 amDLH - SEA
1 stop9h 29mUnited Airlines
Mon 10/2011:40 pmSEA - DLH
1 stop9h 05mUnited Airlines
Deal found 9/14$338
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 11/73:06 pmDLH - SEA
1 stop9h 39mUnited Airlines
Mon 11/1011:59 pmSEA - DLH
1 stop8h 38mUnited Airlines
Deal found 9/15$423
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 10/18:00 amDLH - SEA
1 stop9h 45mUnited Airlines
Sun 10/57:00 amSEA - DLH
1 stop9h 37mUnited Airlines
Deal found 9/15$470
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 10/108:00 amDLH - SEA
1 stop12h 49mUnited Airlines
Wed 10/1511:40 pmSEA - DLH
1 stop9h 05mUnited Airlines
Deal found 9/15$491

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 September 15, 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

Tue 10/28

7:50 am-12:58 pm

1 stop7h 08m

Seattle/Tacoma Intl

Sun 11/2

5:00 am-2:30 pm

1 stop7h 30m

$323

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Tue 10/28

3:06 pm-10:45 pm

1 stop9h 39m

Seattle/Tacoma Intl

Sun 11/2

11:59 pm-10:37 am

1 stop8h 38m

$324

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 10/17

11:20 am-6:49 pm

1 stop9h 29m

Seattle/Tacoma Intl

Mon 10/20

11:40 pm-10:45 am

1 stop9h 05m

$338

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 11/7

3:06 pm-10:45 pm

1 stop9h 39m

Seattle/Tacoma Intl

Mon 11/10

11:59 pm-10:37 am

1 stop8h 38m

$423

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 10/1

8:00 am-3:45 pm

1 stop9h 45m

Seattle/Tacoma Intl

Sun 10/5

7:00 am-6:37 pm

1 stop9h 37m

$470

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 10/10

8:00 am-6:49 pm

1 stop12h 49m

Seattle/Tacoma Intl

Wed 10/15

11:40 pm-10:45 am

1 stop9h 05m

$491

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 10/16

9:45 am-3:45 pm

1 stop8h 00m

$223

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 10/16

12:02 pm-4:54 pm

1 stop6h 52m

$243

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Mon 10/13

11:20 am-12:02 pm

2 stops26h 42m

$393

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 9/19

10:50 am-4:29 pm

1 stop7h 39m

$503

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 11 results
1
2

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 $387). 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 September 15, 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
7,954 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

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
7,954 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

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
8,929 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

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
330 reviews
Delta
8.0
Very good
7,954 reviews

Food

7.3

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.9

Overall

8.0

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 7h 08m. Delta 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, 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 $387). 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
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Duluth to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Minneapolis to Seattle flights
Minneapolis to Portland flights
Minneapolis to Spokane flights
Fargo to Seattle flights
Sioux Falls to Seattle flights
Minneapolis to Pasco flights
Sioux Falls to Portland flights
Fargo to Portland flights
Fargo to Spokane flights
Sioux Falls to Spokane flights
International Falls to Seattle flights
Duluth to Portland flights
Bemidji to Portland flights
Fargo to Pasco flights
Duluth to Spokane flights
La Crosse to Portland flights
La Crosse to Seattle flights
Rochester to Spokane flights
Bemidji to Seattle flights
Minneapolis to Walla Walla flights
Sioux Falls to Pasco flights
Minneapolis to Bellingham flights
Rochester to Seattle flights
Sioux Falls to Yakima flights
Rochester to Portland flights
Minneapolis to Yakima flights
Minneapolis to Pullman flights
Brainerd to Seattle flights
Fargo to Bellingham flights
La Crosse to Spokane flights
Sioux Falls to Bellingham flights
Brainerd to Portland flights
Brainerd to Spokane flights
Hibbing to Portland flights

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 September 15, 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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.