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Duluth

$248+ Cheap flights from Seattle to Duluth (SEA - DLH)

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 5/20. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Apr 27 — May 41
Mon 4/27
Mon 5/4
1 adult, Economy
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Cheap flight deals from Seattle to Duluth

Cheapest flights from Seattle to Duluth
Explore the most affordable flight options available from Seattle to Duluth. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2026.

This Expedia deal was found by Cheapflights users on 3/27. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/49:15 am
SEA
-
DLH
1 stop7h 55m
Sun Country Air
Mon 6/229:45 am
DLH
-
SEA
1 stop9h 12m
Sun Country Air
Deal found 3/27$296
This United Airlines deal was found by Cheapflights users on 3/24. 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 4/811:59 pm
SEA
-
DLH
1 stop8h 40m
United Airlines
Sun 4/126:57 pm
DLH
-
SEA
1 stop7h 37m
United Airlines
Deal found 3/24$414
This United Airlines deal was found by Cheapflights users on 3/26. 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 4/257:00 am
SEA
-
DLH
1 stop9h 07m
United Airlines
Wed 4/293:08 pm
DLH
-
SEA
1 stop9h 34m
United Airlines
Deal found 3/26$428
This United Airlines deal was found by Cheapflights users on 3/27. 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 5/2911:52 pm
SEA
-
DLH
1 stop8h 51m
United Airlines
Sun 5/316:10 pm
DLH
-
SEA
1 stop7h 49m
United Airlines
Deal found 3/27$458
This United Airlines deal was found by Cheapflights users on 3/28. 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 7/158:30 am
SEA
-
DLH
2 stops13h 08m
United Airlines
Tue 7/216:25 pm
DLH
-
SEA
1 stop7h 49m
United Airlines
Deal found 3/28$484
This Delta deal was found by Cheapflights users on 3/28. 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 7/156:05 am
SEA
-
DLH
1 stop7h 22m
Delta
Wed 7/2211:50 am
DLH
-
SEA
1 stop14h 08m
Delta
Deal found 3/28$486
This Delta deal was found by Cheapflights users on 3/26. 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.
Sat 3/283:30 pm
SEA
-
DLH
1 stop5h 17m
Delta
Sat 4/44:32 pm
DLH
-
SEA
1 stop6h 18m
Delta
Deal found 3/26$488
This United Airlines deal was found by Cheapflights users on 3/27. 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 10/2011:11 am
SEA
-
DLH
2 stops11h 42m
United Airlines
Sat 10/245:00 am
DLH
-
SEA
2 stops10h 56m
United Airlines
Deal found 3/27$489
This United Airlines deal was found by Cheapflights users on 3/26. 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 3/288:59 am
SEA
-
DLH
2 stops10h 55m
United Airlines
Sat 4/411:19 am
DLH
-
SEA
1 stop9h 27m
United Airlines
Deal found 3/26$494

Find flight deals from Seattle to Duluth

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Duluth (DLH). 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 March 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$296
(Expedia)

One-way from

$248
(Delta)

Popular in

May

Cheapest in

January

Average price

$428
Provider with most accurate pricing for Seattle/Tacoma Intl-Duluth Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Duluth Intl flights.
Search Deals
From Seattle/Tacoma Intl to Duluth Intl
Search Deals
One-way flight from Seattle/Tacoma Intl to Duluth Intl
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($143 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Duluth 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 March 28, 2026.
Use the filters below to find and compare flights from Seattle to Duluth that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 4/8

11:59 pm-10:39 am

1 stop8h 40m

Duluth Intl

Sun 4/12

6:57 pm-12:34 am

1 stop7h 37m

$414

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 5/29

11:52 pm-10:43 am

1 stop8h 51m

Duluth Intl

Sat 6/6

6:10 pm-11:59 pm

1 stop7h 49m

$428

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 4/25

7:37 pm-10:39 am

2 stops13h 02m

Duluth Intl

Wed 4/29

7:25 am-8:53 pm

2 stops15h 28m

$439

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 7/22

10:40 pm-10:35 am

1 stop9h 55m

Duluth Intl

Thu 7/23

6:25 pm-12:14 am

1 stop7h 49m

$622
Cheapest one-way

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 5/20

10:53 pm-10:43 am

1 stop9h 50m

$248

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sun 5/24

11:52 pm-10:43 am

1 stop8h 51m

$248

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 6/4

11:52 pm-10:43 am

1 stop8h 51m

$248
Quickest one-way

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 5/19

7:00 am-5:35 pm

1 stop8h 35m

$248

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 5/27

11:52 pm-10:43 am

1 stop8h 51m

$623

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Sorted by cheapest first

Compare providers for flights from Seattle to Duluth

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 Seattle to Duluth in March.
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 Seattle-Duluth flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Duluth flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Duluth flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Duluth 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 Seattle-Duluth 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 Seattle to Duluth

Have a flexible travel schedule? Discover the best time to fly to Duluth from Seattle 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 Seattle to Duluth

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

Currently, September is the cheapest month in which you can book a flight from Seattle to Duluth (average of $208). Flying from Seattle to Duluth in May is currently the most expensive (average of $699). 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 Seattle to Duluth?

Reviews of airlines servicing Duluth

Get insights into the airlines that provide service to Duluth. 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 Duluth. Reviews last updated March 28, 2026.
See what other customers who have flown with Delta and United Airlines from Seattle to Duluth have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,359 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2023

BDL - MSP

The seats were wayyyy too small! If you are a larger person buying 2 seats would not work as arm rests do not go up
Delta
7.9
Good
8,359 reviews
Delta
7.9
Good
8,359 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2023

BDL - MSP

The seats were wayyyy too small! If you are a larger person buying 2 seats would not work as arm rests do not go up
United Airlines
7.4
Good
9,509 reviews
Delta
7.9
Good
8,359 reviews

Comfort

7.9

Overall

7.9

Boarding

8.1

Entertainment

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Aug 2023

BDL - MSP

The seats were wayyyy too small! If you are a larger person buying 2 seats would not work as arm rests do not go up

Related info for your journey

Find useful and relevant information for your journey from Seattle to Duluth. 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 Seattle to Duluth?

    For as low as $414, United Airlines can have you in Duluth from Seattle in 8h 40m. Seattle and Duluth are separated by a distance of 1406 mi.

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

    According to our current data, United Airlines ($233), and Delta ($258) offers the cheapest pricing from Seattle to Duluth. You may be able to fly from Seattle to Duluth for 51% less than the average price by searching for these airlines.

  • Can I find deals for flights from Seattle to Duluth that include hotel bookings?

    Yes. In addition to deals on Seattle to Duluth flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Duluth?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Duluth.

  • Can I find deals for business class flights from Seattle to Duluth?

    Yes. Cheapflights offers flight deals from Seattle to Duluth 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 Seattle to Duluth?

    Currently, September is the cheapest month in which you can book a flight from Seattle to Duluth (average of $208). Flying from Seattle to Duluth in May is currently the most expensive (average of $699). 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 Duluth?

Book flights to Duluth if you plan to visit one of these locations
Two Harbors

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Top 2 airlines flying from Seattle to Duluth

Discover the top 2 airlines that operate flights from Seattle to Duluth. 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 March 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$233Average$480FlexibilityNo cancel feeOn-time69%
DeltaCheapest$258Average$522FlexibilityNo cancel feeOn-timeN/A

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