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$203+ 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 9/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap 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 August 14, 2025.

Round-trip from

$308
(Delta)

One-way from

$203
(Delta)

Popular in

May

Cheapest in

November

Average price

$683
From Seattle/Tacoma Intl to Duluth Intl
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One-way flight from Seattle/Tacoma Intl to Duluth Intl
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Highest demand for flights based on searches. 31% potential increase in price ($219 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($25 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 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 August 14, 2025.

This Delta deal was found by Cheapflights users on 8/12. 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 8/2711:55 pmSEA - DLH
1 stop8h 20mDelta
Sun 8/315:10 amDLH - SEA
1 stop5h 38mDelta
Deal found 8/12$308
This United Airlines deal was found by Cheapflights users on 8/12. 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 9/1611:54 pmSEA - DLH
1 stop8h 51mUnited Airlines
Sat 9/203:10 pmDLH - SEA
1 stop9h 10mUnited Airlines
Deal found 8/12$338
This Delta deal was found by Cheapflights users on 8/13. 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 9/311:55 pmSEA - DLH
1 stop8h 20mDelta
Sun 9/75:10 amDLH - SEA
1 stop5h 38mDelta
Deal found 8/13$353
This United Airlines deal was found by Cheapflights users on 8/12. 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 8/277:34 pmSEA - DLH
2 stops13h 11mUnited Airlines
Sun 8/319:45 amDLH - SEA
2 stops13h 32mUnited Airlines
Deal found 8/12$379
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sat 9/66:25 amSEA - DLH
2 stops13h 40mUnited Airlines
Sat 9/139:45 amDLH - SEA
2 stops14h 30mUnited Airlines
Deal found 8/14$433
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/811:54 pmSEA - DLH
1 stop8h 51mUnited Airlines
Thu 9/1111:20 amDLH - SEA
1 stop9h 29mUnited Airlines
Deal found 8/11$466

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 August 14, 2025.
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

Wed 8/27

11:55 pm-10:15 am

1 stop8h 20m

Duluth Intl

Sun 8/31

5:10 am-8:48 am

1 stop5h 38m

$308

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 9/16

11:54 pm-10:45 am

1 stop8h 51m

Duluth Intl

Sat 9/20

3:10 pm-10:20 pm

1 stop9h 10m

$338

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 9/3

11:55 pm-10:15 am

1 stop8h 20m

Duluth Intl

Sun 9/7

5:10 am-8:48 am

1 stop5h 38m

$353

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 8/27

7:34 pm-10:45 am

2 stops13h 11m

Duluth Intl

Sun 8/31

9:45 am-9:17 pm

2 stops13h 32m

$379

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 10/18

6:00 am-3:30 pm

1 stop7h 30m

Duluth Intl

Mon 10/27

12:02 pm-4:54 pm

1 stop6h 52m

$393

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 9/6

6:25 am-10:05 pm

2 stops13h 40m

Duluth Intl

Sat 9/13

9:45 am-10:15 pm

2 stops14h 30m

$433

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Mon 9/8

11:55 pm-10:15 am

1 stop8h 20m

$203

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 10/2

6:00 am-3:40 pm

1 stop7h 40m

$264

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Mon 9/8

7:00 pm-2:35 pm

2 stops17h 35m

$272

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 10/2

6:35 am-10:08 pm

2 stops13h 33m

$279

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/12

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, January is the cheapest month in which you can book a flight from Seattle to Duluth (average of $336). Flying from Seattle to Duluth in June is currently the most expensive (average of $476). 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.

What is the cheapest time of day to fly from SEA to DLH?

Find hourly flight availability from Seattle to Duluth. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

It’s typically best to fly out from Seattle to Duluth in the morning. Doing so could potentially save you 37% on the flight price compared to flying at noon, which is usually more expensive.

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 August 14, 2025.
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
8.0
Very good
7,980 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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
8,916 reviews
Delta
8.0
Very good
7,980 reviews

Entertainment

7.9

Crew

8.5

Overall

8.0

Boarding

8.2

Comfort

7.9

Food

7.3

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.

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

    According to our current data, Delta ($258), and United Airlines ($318) offers the cheapest pricing from Seattle to Duluth. You may be able to fly from Seattle to Duluth for 46% 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, January is the cheapest month in which you can book a flight from Seattle to Duluth (average of $336). Flying from Seattle to Duluth in June is currently the most expensive (average of $476). 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$512FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$318Average$551FlexibilityNo cancel feeOn-time69%

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