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Duluth

$288+ Cheap flights from Seattle to Duluth (SEA - DLH)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap flight deals from Seattle to Duluth

Best flights from Seattle to Duluth
Discover carefully curated flight deals from Seattle to Duluth that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 26, 2025.

This Delta deal was found by Cheapflights users on 12/26. 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.
Fri 2/66:05 amSEA - DLH
1 stop7h 39mDelta
Fri 2/278:00 amDLH - SEA
1 stop8h 54mDelta
Deal found 12/26$288
This United Airlines deal was found by Cheapflights users on 12/24. 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 2/77:00 amSEA - DLH
2 stops12h 59mUnited Airlines
Tue 2/103:05 pmDLH - SEA
2 stops11h 54mUnited Airlines
Deal found 12/24$437
This Delta deal was found by Cheapflights users on 12/25. 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.
Thu 1/223:35 pmSEA - DLH
1 stop6h 17mDelta
Thu 1/298:09 amDLH - SEA
1 stop8h 36mDelta
Deal found 12/25$288
This Delta deal was found by Cheapflights users on 12/26. 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 2/76:05 amSEA - DLH
1 stop7h 39mDelta
Fri 2/278:00 amDLH - SEA
1 stop8h 54mDelta
Deal found 12/26$307
This Delta deal was found by Cheapflights users on 12/26. 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.
Sun 2/85:40 pmSEA - DLH
2 stops20h 04mDelta
Fri 2/278:00 amDLH - SEA
1 stop8h 54mDelta
Deal found 12/26$362
This United Airlines deal was found by Cheapflights users on 12/25. 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.
Thu 1/2210:58 amSEA - DLH
1 stop9h 01mUnited Airlines
Thu 1/297:40 amDLH - SEA
2 stops16h 18mUnited Airlines
Deal found 12/25$445
This Delta deal was found by Cheapflights users on 12/25. 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 1/93:35 pmSEA - DLH
1 stop6h 17mDelta
Tue 1/134:24 pmDLH - SEA
1 stop6h 22mDelta
Deal found 12/25$384
This Delta deal was found by Cheapflights users on 12/26. 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.
Mon 2/96:05 amSEA - DLH
2 stops15h 47mDelta
Fri 2/278:00 amDLH - SEA
1 stop8h 54mDelta
Deal found 12/26$394
This Delta deal was found by Cheapflights users on 12/26. 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.
Tue 2/1011:10 pmSEA - DLH
2 stops22h 42mDelta
Fri 2/278:00 amDLH - SEA
1 stop8h 54mDelta
Deal found 12/26$394

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 December 26, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$286
(Delta)

Popular in

May

Cheapest in

March

Average price

$382
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
Highest demand for flights based on searches. 27% potential increase in price ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 26, 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

Fri 2/6

6:05 am-3:44 pm

1 stop7h 39m

Duluth Intl

Fri 2/27

8:00 am-2:54 pm

1 stop8h 54m

$288

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 1/22

3:35 pm-11:52 pm

1 stop6h 17m

Duluth Intl

Thu 1/29

8:09 am-2:45 pm

1 stop8h 36m

$288

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 2/7

6:05 am-3:44 pm

1 stop7h 39m

Duluth Intl

Fri 2/27

8:00 am-2:54 pm

1 stop8h 54m

$307

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sun 2/8

5:40 pm-3:44 pm

2 stops20h 04m

Duluth Intl

Fri 2/27

8:00 am-2:54 pm

1 stop8h 54m

$362

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 1/9

3:35 pm-11:52 pm

1 stop6h 17m

Duluth Intl

Tue 1/13

4:24 pm-8:46 pm

1 stop6h 22m

$384

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Mon 2/9

6:05 am-11:52 pm

2 stops15h 47m

Duluth Intl

Fri 2/27

8:00 am-2:54 pm

1 stop8h 54m

$394

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 2/10

11:10 pm-11:52 pm

2 stops22h 42m

Duluth Intl

Fri 2/27

8:00 am-2:54 pm

1 stop8h 54m

$394

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 2/7

7:00 am-9:59 pm

2 stops12h 59m

Duluth Intl

Tue 2/10

3:05 pm-12:59 am

2 stops11h 54m

$437

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 1/22

10:58 am-9:59 pm

1 stop9h 01m

Duluth Intl

Thu 1/29

7:40 am-9:58 pm

2 stops16h 18m

$445

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Duluth flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 $418). 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 December 26, 2025.

It’s typically best to fly out from Seattle to Duluth in the morning. Doing so could potentially save you 36% 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 December 26, 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
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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
8,018 reviews
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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
9,116 reviews
Delta
7.9
Good
8,018 reviews

Boarding

8.1

Entertainment

7.9

Overall

7.9

Food

7.3

Crew

8.5

Comfort

7.9

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 $288, Delta can have you in Duluth from Seattle in 7h 39m. 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 August is currently the most expensive (average of $418). 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 December 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$473FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$301Average$398FlexibilityNo cancel feeOn-time69%

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