HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Duluth

$303+ 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 4/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$366
(Delta)

One-way from

$303
(Delta)

Popular in

June

Cheapest in

January

Average price

$308
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. 27% potential increase in price ($188 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 26, 2025.

This Delta deal was found by Cheapflights users on 3/24. 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.
Mon 4/2112:45 amSEA - DLH
1 stop7h 26mDelta
Tue 4/292:34 pmDLH - SEA
1 stop8h 16mDelta
Deal found 3/24$366
This United Airlines deal was found by Cheapflights users on 3/24. 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 4/225:05 pmSEA - DLH
2 stops15h 37mUnited Airlines
Tue 4/293:05 pmDLH - SEA
1 stop9h 38mUnited Airlines
Deal found 3/24$372
This Mytrip deal was found by Cheapflights users on 3/24. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/279:48 amSEA - DLH
3 stops30h 07mMultiple Airlines
Mon 3/317:00 pmDLH - SEA
3 stops39h 43mMultiple Airlines
Deal found 3/24$1,271

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 March 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

Mon 4/21

12:45 am-10:11 am

1 stop7h 26m

Duluth Intl

Tue 4/29

2:34 pm-8:50 pm

1 stop8h 16m

$366

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Tue 4/22

5:05 pm-10:42 am

2 stops15h 37m

Duluth Intl

Tue 4/29

3:05 pm-10:43 pm

1 stop9h 38m

$372

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 4/24

6:20 am-1:54 pm

1 stop5h 34m

$303

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 4/10

10:45 am-5:59 pm

2 stops29h 14m

$322

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 4/24

5:10 pm-10:42 am

2 stops15h 32m

$330

SeattleDuluth

SEA - DLH

SEADLH

Seattle/Tacoma Intl

Thu 4/10

12:30 pm-5:59 pm

3 stops27h 29m

$523

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust 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 $335). Flying from Seattle to Duluth in June is currently the most expensive (average of $483). 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 March 26, 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.

Rainfall in Duluth by month

Plan your trip to Duluth by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Duluth ranges from 0.6 - 3.6 inches per month. August is typically the wettest month, when rainfall can reach 3.6 in. February is typically the driest time to visit Duluth when rainfall is around 0.6 in.

Temperature in Duluth by month

Plan your trip to Duluth by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Duluth, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 12.2 F).

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 March 26, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines and Sun Country Air from Seattle to Duluth to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,891 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

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
7,891 reviews
Delta
8.0
Very good
7,891 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

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
8,608 reviews
Delta
8.0
Very good
7,891 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

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
Sun Country Air
6.9
Okay
348 reviews
Delta
8.0
Very good
7,891 reviews

Crew

8.5

Food

7.3

Overall

8.0

Comfort

8.0

Boarding

8.2

Entertainment

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.

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

    According to our current data, Delta ($366), and United Airlines ($372) offers the cheapest pricing from Seattle to Duluth. You may be able to fly from Seattle to Duluth for 26% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Seattle to Duluth one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $303. Sun Country Air flights start at $322 while deals on United Airlines start at $330 one-way.

  • 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 $335). Flying from Seattle to Duluth in June is currently the most expensive (average of $483). 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 Seattle?

Book flights to Seattle 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 Fargo flights
Portland to Fargo flights
Portland to Sioux Falls flights
Seattle to Sioux Falls flights
Pasco to Minneapolis flights
Seattle to Rochester flights
Portland to Duluth flights
Spokane to Duluth flights
Bellingham to Minneapolis flights
Spokane to Fargo flights
Spokane to Sioux Falls flights
Portland to Bemidji flights
Seattle to Brainerd flights
Pullman to Minneapolis flights
Seattle to Bemidji flights
Pasco to Duluth flights
Walla Walla to Minneapolis flights
Wenatchee to Minneapolis flights
Portland to La Crosse flights
Seattle to La Crosse flights
Portland to Thief River Falls flights
Portland to Rochester flights
Bellingham to La Crosse flights
Seattle to Hibbing flights
Bellingham to Fargo flights

Top 3 airlines flying from Seattle to Duluth

Discover the top 3 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Sun Country AirCheapest$113Average$346FlexibilityNo cancel feeOn-time83%
DeltaCheapest$258Average$456FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$318Average$488FlexibilityNo 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.