$333+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DLH
Oct 24 — Oct 311
Round-trip
1 adult, Economy
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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
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to DuluthExplore 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 24, 2026.
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 24, 2026.
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/201:56 pm -
1 stop7h 26m
Tue 10/276:54 am -
1 stop10h 38m
Deal found 9/22![United Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 9/22. 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 10/116:00 am -
1 stop7h 41m
Wed 10/214:21 pm -
1 stop6h 29m
Deal found 9/22![Delta logo]()
$405
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sun 10/1111:13 pm -
1 stop9h 29m
Wed 10/217:45 am -
1 stop10h 06m
Deal found 9/23![United Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 9/22. 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 11/77:00 am -
1 stop8h 38m
Wed 11/1111:16 am -
2 stops14h 17m
Deal found 9/22![United Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/911:13 pm -
1 stop9h 29m
Tue 10/136:00 am -
1 stop7h 27m
Deal found 9/24![United Airlines logo]()
$593
Best flights from Seattle to DuluthDiscover 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 September 24, 2026.
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 September 24, 2026.
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/201:56 pm -
1 stop7h 26m
Tue 10/276:54 am -
1 stop10h 38m
Deal found 9/22![United Airlines logo]()
$358
This Delta deal was found by Cheapflights users on 9/22. 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 10/116:00 am -
1 stop7h 41m
Wed 10/214:21 pm -
1 stop6h 29m
Deal found 9/22![Delta logo]()
$405
This United Airlines deal was found by Cheapflights users on 9/19. 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 11/77:00 am -
1 stop8h 38m
Wed 11/1111:16 am -
2 stops14h 17m
Deal found 9/19![United Airlines logo]()
$511
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/911:13 pm -
1 stop9h 29m
Tue 10/136:00 am -
1 stop7h 27m
Deal found 9/24![United Airlines logo]()
$593
Last-minute flights from Seattle to DuluthDiscover last-minute flight deals from Seattle to Duluth. Data last updated September 24, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Duluth. Data last updated September 24, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/24. 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 10/911:13 pm -
1 stop9h 29m
Tue 10/136:00 am -
1 stop7h 27m
Deal found 9/24![United Airlines logo]()
$593
This Delta deal was found by Cheapflights users on 9/22. 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 10/116:00 am -
1 stop7h 41m
Wed 10/214:21 pm -
1 stop6h 29m
Deal found 9/22![Delta logo]()
$405
This United Airlines deal was found by Cheapflights users on 9/23. 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.
Sun 10/1111:13 pm -
1 stop9h 29m
Wed 10/217:45 am -
1 stop10h 06m
Deal found 9/23![United Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/201:56 pm -
1 stop7h 26m
Tue 10/276:54 am -
1 stop10h 38m
Deal found 9/22![United Airlines logo]()
$358
This United Airlines deal was found by Cheapflights users on 9/19. 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 10/231:56 pm -
1 stop7h 26m
Sun 10/2511:16 am -
1 stop9h 47m
Deal found 9/19![United Airlines logo]()
$620
One-way flights from Seattle to DuluthSearch for one-way flight options from Seattle to Duluth. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.
Search for one-way flight options from Seattle to Duluth. Find affordable one-way fares based on user searches. Data last updated September 24, 2026.
This United Airlines deal was found by Cheapflights users on 9/23. 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 10/141:56 pm -
1 stop7h 26m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/23![United Airlines logo]()
$333
This Delta deal was found by Cheapflights users on 9/21. 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 10/236:00 am -
1 stop7h 41m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/21![Delta logo]()
$352
This United Airlines deal was found by Cheapflights users on 9/22. 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 10/2311:13 pm -
1 stop9h 29m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/22![United Airlines logo]()
$388
This United Airlines deal was found by Cheapflights users on 9/20. 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.
Sun 11/89:05 am -
3 stops23h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/20![United Airlines logo]()
$627
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 September 24, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $358 (United Airlines) |
One-way from | $333 (United Airlines) |
Popular in | June |
Cheapest in | December |
Average price | $479 |
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 7,457,451 searches. Data last updated September 24, 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
Cheapest round-trip
Quickest round-trip
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Wed 10/14
1:56 pm-11:22 pm
1 stop7h 26m
Duluth Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$333
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Sun 11/8
10:56 pm-10:41 am
1 stop9h 45m
Duluth Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$333
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Fri 10/23
6:00 am-3:41 pm
1 stop7h 41m
Duluth Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$352
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Tue 10/20
1:56 pm-11:22 pm
1 stop7h 26m
Duluth Intl
Tue 10/27
6:54 am-3:32 pm
1 stop10h 38m
$358
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Fri 10/23
11:13 pm-10:42 am
1 stop9h 29m
Duluth Intl
Wed 12/31
12:00 am-10:00 pm
Nonstop0h 00m
$388
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Sun 10/11
6:00 am-3:41 pm
1 stop7h 41m
Duluth Intl
Wed 10/21
4:21 pm-8:50 pm
1 stop6h 29m
$405
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Sat 11/7
7:00 am-5:38 pm
1 stop8h 38m
Duluth Intl
Wed 11/11
11:16 am-11:33 pm
2 stops14h 17m
$511
SeattleDuluth
SEA Seattle/Tacoma Intl - DLH Duluth Intl
SEADLH
Seattle/Tacoma Intl
Fri 10/9
11:13 pm-10:42 am
1 stop9h 29m
Duluth Intl
Tue 10/13
6:00 am-11:27 am
1 stop7h 27m
$593
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 September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
SEA-DLH
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, December is the cheapest month in which you can book a flight from Seattle to Duluth (average of $293). 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.
How much does it cost to fly round-trip from Seattle to Duluth?
Airfare is below average for this route at the moment.
Seattle to Duluth flights typically cost between $390 and $614 in October.The cheapest round-trip price found within the last 5 days was $358 on United Airlines (Oct 20-Oct 27).
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 24, 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.
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Entertainment
7.8
Boarding
8.1
Comfort
7.8
Crew
8.5
Food
7.2
Overall
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
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.
Traveling to a place near Duluth?
Book flights to Duluth if you plan to visit one of these locationsTwo Harbors
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Complete your trip
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Other flights to Duluth
Explore flights to Duluth departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 24, 2026.
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Seattle and Duluth flights
Browse other Seattle and Duluth flight options. Last updated on September 24, 2026.
Other flights from Seattle
Browse through other flights departing from Seattle. Flights are based on user searches made on Cheapflights and were last updated on September 24, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
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 7,457,451 searches. Data last updated September 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$258 | Average$492 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$342 | Average$480 | FlexibilityNo cancel fee | On-time69% |