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Duluth

$314+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Jul 28 — Aug 41
Tue 7/28
Tue 8/4
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 June 28, 2026.

This Delta deal was found by Cheapflights users on 6/23. 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 9/232:30 pm
SEA
-
DLH
1 stop6h 05m
Delta
Mon 9/285:15 am
DLH
-
SEA
1 stop7h 24m
Delta
Deal found 6/23$318
This Delta deal was found by Cheapflights users on 6/23. 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 9/2311:59 am
SEA
-
DLH
1 stop5h 26m
Delta
Wed 9/304:11 pm
DLH
-
SEA
1 stop6h 10m
Delta
Deal found 6/23$383
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Tue 11/311:03 pm
SEA
-
DLH
1 stop9h 41m
United Airlines
Sat 11/73:14 pm
DLH
-
SEA
1 stop9h 39m
United Airlines
Deal found 6/24$408
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Sat 8/299:05 am
SEA
-
DLH
2 stops12h 17m
United Airlines
Sat 9/193:10 pm
DLH
-
SEA
1 stop9h 35m
United Airlines
Deal found 6/24$412
This United Airlines deal was found by Cheapflights users on 6/23. 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 9/2311:03 am
SEA
-
DLH
2 stops10h 07m
United Airlines
Tue 9/296:00 am
DLH
-
SEA
3 stops17h 15m
United Airlines
Deal found 6/23$424
This Delta deal was found by Cheapflights users on 6/23. 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 9/232:30 pm
SEA
-
DLH
1 stop6h 05m
Delta
Sun 9/275:15 am
DLH
-
SEA
1 stop7h 24m
Delta
Deal found 6/23$427
This Delta deal was found by Cheapflights users on 6/24. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/216:05 am
SEA
-
DLH
1 stop7h 26m
Delta
Wed 8/265:15 am
DLH
-
SEA
1 stop5h 33m
Delta
Deal found 6/24$448
This United Airlines deal was found by Cheapflights users on 6/24. 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.
Fri 8/211:57 pm
SEA
-
DLH
1 stop7h 25m
United Airlines
Wed 8/2611:18 am
DLH
-
SEA
2 stops12h 40m
United Airlines
Deal found 6/24$452

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 June 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$318
(Delta)

One-way from

$314
(United Airlines)

Popular in

June

Cheapest in

September

Average price

$838
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. 29% potential increase in price ($210 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 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

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 8/21

1:57 pm-11:22 pm

1 stop7h 25m

Duluth Intl

Wed 8/26

11:18 am-9:58 pm

2 stops12h 40m

$452

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 8/29

7:00 am-5:34 pm

1 stop8h 34m

Duluth Intl

Sat 9/19

3:10 pm-10:45 pm

1 stop9h 35m

$479

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 9/3

1:57 pm-11:22 pm

1 stop7h 25m

Duluth Intl

Sun 9/6

7:45 am-8:45 pm

2 stops15h 00m

$563

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 8/11

6:30 am-11:22 pm

2 stops14h 52m

Duluth Intl

Sat 8/15

7:45 am-7:07 pm

1 stop13h 22m

$625
Quickest round-trip

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 8/22

2:30 pm-10:41 pm

1 stop6h 11m

Duluth Intl

Wed 8/26

5:15 am-8:48 am

1 stop5h 33m

$688
Cheapest one-way
Quickest one-way

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 7/11

12:05 pm-7:25 pm

1 stop5h 20m

$344

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 7/29

1:55 pm-11:23 pm

1 stop7h 28m

$384

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 7/14

2:30 pm-10:49 pm

1 stop6h 19m

$384

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 7/15

2:30 pm-10:49 pm

1 stop6h 19m

$484

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 7/14

5:00 am-2:26 pm

3 stops31h 26m

$646

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

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 June.
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 $338). Flying from Seattle to Duluth in June is currently the most expensive (average of $838). 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 June 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
7.8
Good
8,455 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

7.8

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
Delta
7.8
Good
8,455 reviews
Delta
7.8
Good
8,455 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

7.8

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional
United Airlines
7.4
Good
9,899 reviews
Delta
7.8
Good
8,455 reviews

Boarding

8.1

Crew

8.5

Comfort

7.8

Overall

7.8

Food

7.2

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Anonymous,May 2026

SEA - KOA

The snacks were not very good, not everyone was very friendly and professional

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 $452, United Airlines can have you in Duluth from Seattle in 7h 25m. 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, Delta ($258), and United Airlines ($278) offers the cheapest pricing from Seattle to Duluth. You may be able to fly from Seattle to Duluth for 49% 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 $338). Flying from Seattle to Duluth in June is currently the most expensive (average of $838). 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 June 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$492FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$278Average$480FlexibilityNo cancel feeOn-time69%

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