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Duluth

$218+ 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 4/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Mar 13 — Mar 201
Fri 3/13
Fri 3/20
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 February 11, 2026.

This United Airlines deal was found by Cheapflights users on 2/7. 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 10/211:50 pm
SEA
-
DLH
1 stop8h 54m
United Airlines
Fri 10/96:10 pm
DLH
-
SEA
1 stop7h 49m
United Airlines
Deal found 2/7$323
This United Airlines deal was found by Cheapflights users on 2/9. 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 2/2411:59 pm
SEA
-
DLH
1 stop8h 44m
United Airlines
Sat 2/283:19 pm
DLH
-
SEA
1 stop9h 24m
United Airlines
Deal found 2/9$328
This United Airlines deal was found by Cheapflights users on 2/8. 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 2/2111:59 pm
SEA
-
DLH
1 stop8h 44m
United Airlines
Fri 3/203:07 pm
DLH
-
SEA
1 stop9h 38m
United Airlines
Deal found 2/8$377
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:10 am
SEA
-
DLH
1 stop7h 21m
Delta
Tue 3/38:00 am
DLH
-
SEA
1 stop6h 23m
Delta
Deal found 2/11$394
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.
Sat 2/2811:59 pm
SEA
-
DLH
1 stop8h 44m
United Airlines
Wed 3/43:19 pm
DLH
-
SEA
1 stop9h 24m
United Airlines
Deal found 2/10$418

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 February 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$328
(United Airlines)

One-way from

$218
(United Airlines)

Popular in

May

Cheapest in

March

Average price

$398
Provider with most accurate pricing for Seattle/Tacoma Intl-Duluth Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Duluth Intl flights.
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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. 30% potential increase in price ($206 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($23 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 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 February 11, 2026.
Use the filters below to find and compare flights from Seattle to Duluth that are best for you.

Fly from

Seattle

Fly to

Duluth

Route

Depart

Return

Price

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 2/24

11:59 pm-10:43 am

1 stop8h 44m

Duluth Intl

Sat 2/28

3:19 pm-10:43 pm

1 stop9h 24m

$328

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 2/27

6:10 am-3:31 pm

1 stop7h 21m

Duluth Intl

Tue 3/3

8:00 am-12:23 pm

1 stop6h 23m

$394

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 2/28

11:59 pm-10:43 am

1 stop8h 44m

Duluth Intl

Wed 3/4

3:19 pm-10:43 pm

1 stop9h 24m

$418

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 5/8

6:58 pm-10:29 am

2 stops13h 31m

Duluth Intl

Tue 5/12

7:45 am-10:42 pm

1 stop16h 57m

$461

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 4/1

7:00 am-6:09 pm

1 stop9h 09m

$218

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/10

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 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 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 August is currently the most expensive (average of $429). 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 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 February 11, 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
8,180 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

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
8,180 reviews
Delta
7.9
Good
8,180 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

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
9,279 reviews
Delta
7.9
Good
8,180 reviews

Boarding

8.1

Overall

7.9

Crew

8.5

Comfort

7.9

Entertainment

7.8

Food

7.2

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 $394, United Airlines can have you in Duluth from Seattle in 7h 21m. Seattle and Duluth are separated by a distance of 1406 mi. This flight may include one or multiple stops.

  • 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 August is currently the most expensive (average of $429). 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
Superior

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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 February 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$233Average$398FlexibilityNo cancel feeOn-time69%
DeltaCheapest$258Average$587FlexibilityNo cancel feeOn-timeN/A

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