$333+ Cheap flights from Duluth to Seattle (DLH - SEA)
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 10/8. Fares are subject to change and may not be available on all flights or dates of travel.
DLH — SEA
Oct 16 — Oct 231
Round-trip
1 adult, Economy
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Find cheap flights from Duluth to Seattle 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 Duluth to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from Duluth to SeattleExplore the most affordable flight options available from Duluth to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2026.
Explore the most affordable flight options available from Duluth to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2026.
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/77:45 am -
2 stops14h 52m
Wed 10/141:56 pm -
1 stop7h 26m
Deal found 9/16![United Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/106:00 am -
1 stop7h 27m
Mon 10/1211:13 pm -
1 stop9h 29m
Deal found 9/14![United Airlines logo]()
$395
This Delta deal was found by Cheapflights users on 9/12. 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 11/44:21 pm -
1 stop6h 29m
Sat 11/146:00 am -
1 stop7h 45m
Deal found 9/12![Delta logo]()
$404
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/13:10 pm -
1 stop9h 46m
Mon 10/511:13 pm -
1 stop9h 29m
Deal found 9/16![United Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/93:10 pm -
1 stop9h 46m
Tue 10/1311:13 pm -
1 stop9h 29m
Deal found 9/11![United Airlines logo]()
$432
This United Airlines deal was found by Cheapflights users on 9/15. 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 12/55:54 am -
1 stop7h 50m
Wed 12/92:05 pm -
1 stop7h 04m
Deal found 9/15![United Airlines logo]()
$438
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/257:45 am -
1 stop10h 23m
Fri 10/21:56 pm -
1 stop7h 26m
Deal found 9/14![United Airlines logo]()
$453
Best flights from Duluth to SeattleDiscover carefully curated flight deals from Duluth to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2026.
Discover carefully curated flight deals from Duluth to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 16, 2026.
This Delta deal was found by Cheapflights users on 9/12. 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 11/44:21 pm -
1 stop6h 29m
Sat 11/146:00 am -
1 stop7h 45m
Deal found 9/12![Delta logo]()
$404
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/153:10 pm -
1 stop9h 46m
Thu 10/2910:56 pm -
1 stop9h 45m
Deal found 9/14![United Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/13:10 pm -
1 stop9h 46m
Mon 10/511:13 pm -
1 stop9h 29m
Deal found 9/16![United Airlines logo]()
$418
This Delta deal was found by Cheapflights users on 9/12. 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 10/912:35 pm -
1 stop6h 23m
Tue 10/131:42 pm -
1 stop7h 15m
Deal found 9/12![Delta logo]()
$466
This United Airlines deal was found by Cheapflights users on 9/12. 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 12/55:54 am -
1 stop7h 50m
Wed 12/92:05 pm -
1 stop7h 04m
Deal found 9/12![United Airlines logo]()
$438
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/77:45 am -
2 stops14h 52m
Wed 10/149:05 am -
2 stops12h 17m
Deal found 9/16![United Airlines logo]()
$459
Last-minute flights from Duluth to SeattleDiscover last-minute flight deals from Duluth to Seattle. Data last updated September 16, 2026 and is based on user searches.
Discover last-minute flight deals from Duluth to Seattle. Data last updated September 16, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 9/14. 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 9/257:45 am -
1 stop10h 23m
Fri 10/21:56 pm -
1 stop7h 26m
Deal found 9/14![United Airlines logo]()
$453
This United Airlines deal was found by Cheapflights users on 9/13. 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 9/306:00 am -
1 stop7h 27m
Mon 10/511:13 pm -
1 stop9h 29m
Deal found 9/13![United Airlines logo]()
$493
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/13:10 pm -
1 stop9h 46m
Mon 10/511:13 pm -
1 stop9h 29m
Deal found 9/16![United Airlines logo]()
$418
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/77:45 am -
2 stops14h 52m
Wed 10/141:56 pm -
1 stop7h 26m
Deal found 9/16![United Airlines logo]()
$364
This United Airlines deal was found by Cheapflights users on 9/11. 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 10/93:10 pm -
1 stop9h 46m
Tue 10/1311:13 pm -
1 stop9h 29m
Deal found 9/11![United Airlines logo]()
$432
This Delta deal was found by Cheapflights users on 9/12. 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 10/912:35 pm -
1 stop6h 23m
Tue 10/131:42 pm -
1 stop7h 15m
Deal found 9/12![Delta logo]()
$466
This United Airlines deal was found by Cheapflights users on 9/14. 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 10/106:00 am -
1 stop7h 27m
Mon 10/1211:13 pm -
1 stop9h 29m
Deal found 9/14![United Airlines logo]()
$395
This Delta deal was found by Cheapflights users on 9/14. 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 10/185:14 am -
1 stop7h 45m
Sat 10/246:00 am -
1 stop7h 41m
Deal found 9/14![Delta logo]()
$494
One-way flights from Duluth to SeattleSearch for one-way flight options from Duluth to Seattle. Find affordable one-way fares based on user searches. Data last updated September 16, 2026.
Search for one-way flight options from Duluth to Seattle. Find affordable one-way fares based on user searches. Data last updated September 16, 2026.
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/83:10 pm -
1 stop9h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![United Airlines logo]()
$333
This United Airlines deal was found by Cheapflights users on 9/16. 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 10/77:45 am -
2 stops14h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/16![United Airlines logo]()
$339
This Delta deal was found by Cheapflights users on 9/14. 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 10/55:15 am -
1 stop7h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/14![Delta logo]()
$384
This United Airlines deal was found by Cheapflights users on 9/15. 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 10/177:45 am -
3 stops17h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$389
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Mon 10/56:00 am -
1 stop7h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![United Airlines logo]()
$433
This Delta deal was found by Cheapflights users on 9/15. 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 10/45:15 am -
1 stop7h 24m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/15![Delta logo]()
$458
This United Airlines deal was found by Cheapflights users on 9/13. 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 3/52:59 pm -
2 stops10h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![United Airlines logo]()
$514
This United Airlines deal was found by Cheapflights users on 9/13. 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 10/911:18 am -
2 stops35h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/13![United Airlines logo]()
$537
Find flight deals from Duluth to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Duluth (DLH) to Seattle (SEA). 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 16, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $395 (United Airlines) |
One-way from | $333 (United Airlines) |
Cheapflights Fare Finder
Customize your flight search to find flights from Duluth to Seattle 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 16, 2026.
Use the filters below to find and compare flights from Duluth to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Fri 3/5
2:59 pm-8:29 pm
1 stop7h 30m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$333
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Fri 10/9
11:18 am-6:52 pm
1 stop9h 34m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$333
Quickest round-trip
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Mon 10/5
5:15 am-10:39 am
1 stop7h 24m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$384
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Wed 11/4
4:21 pm-8:50 pm
1 stop6h 29m
Seattle/Tacoma Intl
Sat 11/14
6:00 am-3:45 pm
1 stop7h 45m
$404
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Thu 10/15
3:10 pm-10:56 pm
1 stop9h 46m
Seattle/Tacoma Intl
Thu 10/29
10:56 pm-10:41 am
1 stop9h 45m
$418
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Thu 10/1
3:10 pm-10:56 pm
1 stop9h 46m
Seattle/Tacoma Intl
Mon 10/5
11:13 pm-10:42 am
1 stop9h 29m
$418
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Wed 10/7
11:18 am-6:52 pm
1 stop9h 34m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$421
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Sat 12/5
5:54 am-11:44 am
1 stop7h 50m
Seattle/Tacoma Intl
Wed 12/9
2:05 pm-11:09 pm
1 stop7h 04m
$438
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Mon 10/5
11:18 am-11:26 pm
2 stops14h 08m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$439
DuluthSeattle
DLH Duluth Intl - SEA Seattle/Tacoma Intl
DLHSEA
Duluth Intl
Sun 10/4
5:15 am-10:39 am
1 stop7h 24m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-2:00 am
Nonstop0h 00m
$458
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Duluth to Seattle
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 Duluth to Seattle 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 Duluth-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Duluth-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Duluth-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Duluth-Seattle 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 Duluth-Seattle 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 Duluth to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Duluth with our price prediction graph.
DLH-SEA
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.
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated September 16, 2026.
Read reviews from past customers who have flown Delta and United Airlines from Duluth to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.8
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
8.0
ExcellentLesley,Aug 2023
LIH - SEA
Overall
7.8
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
8.0
ExcellentLesley,Aug 2023
LIH - SEA
Overall
7.8
Crew
8.5
Comfort
7.8
Entertainment
7.8
Boarding
8.1
Food
7.2
Reviews
1 / 20
8.0
ExcellentLesley,Aug 2023
LIH - SEA
Related info for your journey
Find useful and relevant information for your journey from Duluth to Seattle. 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 Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
Poulsbo
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.
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Duluth and Seattle flights
Browse other Duluth and Seattle flight options. Last updated on September 16, 2026.
Other flights from Duluth
Browse through other flights departing from Duluth. Flights are based on user searches made on Cheapflights and were last updated on September 16, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 16, 2026.
Top 2 airlines flying from Duluth to Seattle
Discover the top 2 airlines that operate flights from Duluth to Seattle. 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 16, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$273 | Average$423 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$307 | Average$457 | FlexibilityNo cancel fee | On-time69% |