HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Duluth

$191+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Oct 29 — Nov 51
Wed 10/29
Wed 11/5
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Duluth with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 29, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$418
(United Airlines)

One-way from

$191
(United Airlines)

Popular in

May

Cheapest in

November

Average price

$338
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. 30% potential increase in price ($215 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 September 2025
Search Deals

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 September 29, 2025.

This United Airlines deal was found by Cheapflights users on 9/28. 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.
Tue 10/147:00 amSEA - DLH
1 stop9h 37mUnited Airlines
Sat 10/189:45 amDLH - SEA
1 stop8h 00mUnited Airlines
Deal found 9/28$418
This United Airlines deal was found by Cheapflights users on 9/29. 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 10/187:00 amSEA - DLH
1 stop9h 37mUnited Airlines
Wed 10/223:07 pmDLH - SEA
1 stop9h 23mUnited Airlines
Deal found 9/29$423
This United Airlines deal was found by Cheapflights users on 9/27. 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 10/247:00 amSEA - DLH
1 stop9h 37mUnited Airlines
Sun 11/911:14 amDLH - SEA
1 stop24h 36mUnited Airlines
Deal found 9/27$457
This United Airlines deal was found by Cheapflights users on 9/27. 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.
Thu 10/167:00 amSEA - DLH
1 stop9h 37mUnited Airlines
Wed 10/2211:20 amDLH - SEA
2 stops15h 39mUnited Airlines
Deal found 9/27$502

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 September 29, 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

Tue 10/14

7:00 am-6:37 pm

1 stop9h 37m

Duluth Intl

Sat 10/18

9:45 am-3:45 pm

1 stop8h 00m

$418

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Sat 10/18

7:00 am-6:37 pm

1 stop9h 37m

Duluth Intl

Wed 10/22

11:20 am-9:53 pm

2 stops12h 33m

$429

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 10/24

7:00 am-6:37 pm

1 stop9h 37m

Duluth Intl

Sun 11/9

11:14 am-9:50 am

1 stop24h 36m

$457

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 10/16

1:12 pm-2:32 pm

2 stops23h 20m

Duluth Intl

Wed 10/22

11:20 am-11:15 pm

2 stops13h 55m

$546

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 11/26

12:35 pm-9:59 pm

1 stop7h 24m

Duluth Intl

Sun 11/30

11:14 am-9:47 am

1 stop24h 33m

$775

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 11/26

1:49 pm-11:50 pm

1 stop8h 01m

Duluth Intl

Sun 11/30

5:10 am-10:54 am

1 stop7h 44m

$822

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Fri 10/10

1:35 pm-11:42 pm

1 stop8h 07m

Duluth Intl

Tue 10/14

5:18 am-10:45 am

1 stop7h 27m

$868

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 11/5

8:00 am-9:59 pm

2 stops11h 59m

$240

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Wed 11/5

3:35 pm-11:42 pm

3 stops30h 07m

$629

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/27

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 September.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
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 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, January is the cheapest month in which you can book a flight from Seattle to Duluth (average of $339). Flying from Seattle to Duluth in June is currently the most expensive (average of $475). 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 September 29, 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 September 29, 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
7,964 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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
8.0
Very good
7,964 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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
8,924 reviews
Delta
8.0
Very good
7,964 reviews

Boarding

8.2

Crew

8.5

Overall

8.0

Food

7.3

Entertainment

7.9

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 $418, United Airlines can have you in Duluth from Seattle in 9h 37m. 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 ($301) 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 $339). Flying from Seattle to Duluth in June is currently the most expensive (average of $475). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Duluth

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Minneapolis flights
Portland to Minneapolis flights
Spokane to Minneapolis flights
Seattle to Sioux Falls flights
Portland to Sioux Falls flights
Pasco to Minneapolis flights
Portland to Rochester flights
Spokane to Sioux Falls flights
Seattle to Fargo flights
Portland to Duluth flights
Portland to Fargo flights
Seattle to La Crosse flights
Seattle to Brainerd flights
Spokane to Duluth flights
Seattle to Rochester flights
Portland to Bemidji flights
Spokane to Fargo flights
Pullman to Minneapolis flights
Pasco to Duluth flights
Seattle to Hibbing flights
Portland to La Crosse flights
Bellingham to Minneapolis flights
Bellingham to Fargo flights
Portland to Thief River Falls flights
Seattle to Bemidji flights
Wenatchee to Minneapolis flights
Bellingham to La Crosse flights
Walla Walla to Minneapolis flights

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 September 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$523FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$301Average$398FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.