What is the cheapest airline that flies from Duluth Intl to Seattle/Tacoma Intl?

United Airlines is the most popular carrier operating from Duluth Intl to Seattle/Tacoma Intl

When did momondo last update prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?

Prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport refresh daily.

How many operators does momondo search for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?

The number of operators available for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport is 2 as of March 2026.

How old do you have to be to fly from Duluth Intl Airport to Seattle/Tacoma Intl Airport?

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Duluth Intl Airport to Seattle/Tacoma Intl Airport.

What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$183 Cheap Flights from Duluth to Seattle in 2026

Q: What is the typical price of a round-trip flight between Duluth and Seattle?

Prices are currently typical for flights on this route. Typical prices usually range from $389 to $528. The lowest price recently found on this route was $409.

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Find the cheapest flights from Duluth to Seattle

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:10 pm - 11:59 pm

DLH

SEA

7h 49m

1 stop

7:00 am - 5:34 pm

SEA

DLH

8h 34m

1 stop

$409United Airlines

Wed, May 27 - Sat, May 30

5:00 am - 4:20 pm

DLH

SEA

13h 20m

2 stops

7:00 am - 5:34 pm

SEA

DLH

8h 34m

1 stop

$414United Airlines

Wed, May 27 - Sat, May 30

11:18 am - 11:10 pm

DLH

SEA

13h 52m

2 stops

7:05 pm - 10:43 am

SEA

DLH

13h 38m

2 stops

$419United Airlines

Wed, May 27 - Sat, May 30

5:00 am - 2:22 pm

DLH

SEA

11h 22m

2 stops

7:35 pm - 10:30 am

SEA

DLH

12h 55m

2 stops

$431United Airlines

Fri, Aug 21 - Sat, Aug 29

6:10 pm - 11:59 pm

DLH

SEA

7h 49m

1 stop

5:04 pm - 10:30 am

SEA

DLH

15h 26m

2 stops

$443United Airlines

Thu, Aug 6 - Mon, Aug 10

3:07 pm - 10:45 pm

DLH

SEA

9h 38m

1 stop

11:59 pm - 10:43 am

SEA

DLH

8h 44m

1 stop

$468United Airlines

Sat, Mar 21 - Fri, Mar 27

4:32 pm - 11:40 pm

DLH

SEA

9h 08m

1 stop

11:59 pm - 11:56 am

SEA

DLH

9h 57m

1 stop

$474Delta

Sun, Mar 22 - Fri, Mar 27

4:30 pm - 8:41 pm

DLH

SEA

6h 11m

1 stop

11:53 pm - 11:38 pm

SEA

DLH

21h 45m

1 stop

$476Delta

Sat, Jun 6 - Sat, Jun 13

4:30 pm - 8:41 pm

DLH

SEA

6h 11m

1 stop

9:30 am - 11:38 pm

SEA

DLH

12h 08m

2 stops

$485Delta

Sat, Jun 6 - Thu, Jun 11

11:18 am - 11:10 pm

DLH

SEA

13h 52m

2 stops

7:40 am - 11:08 pm

SEA

DLH

13h 28m

2 stops

$493United Airlines

Wed, May 27 - Sat, May 30

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Mar 22

DLH4:32 pmDuluth Intl

9h 08m

1 stop

SEA11:40 pmSeattle/Tacoma Intl

Mar 27

SEA11:59 pmSeattle/Tacoma Intl

9h 57m

1 stop

DLH11:56 amDuluth Intl

$474

Delta

Jun 6

DLH4:30 pmDuluth Intl

6h 11m

1 stop

SEA8:41 pmSeattle/Tacoma Intl

Jun 13

SEA11:53 pmSeattle/Tacoma Intl

21h 45m

1 stop

DLH11:38 pmDuluth Intl

$476

Delta

Jun 6

DLH4:30 pmDuluth Intl

6h 11m

1 stop

SEA8:41 pmSeattle/Tacoma Intl

Jun 12

SEA9:30 amSeattle/Tacoma Intl

12h 08m

2 stops

DLH11:38 pmDuluth Intl

$485

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

Apr 18

DLH11:19 amDuluth Intl

11h 38m

2 stops

SEA8:57 pmSeattle/Tacoma Intl

Apr 22

SEA11:59 pmSeattle/Tacoma Intl

8h 40m

1 stop

DLH10:39 amDuluth Intl

$384

United Airlines

Apr 18

DLH11:19 amDuluth Intl

11h 38m

2 stops

SEA8:57 pmSeattle/Tacoma Intl

Apr 22

SEA7:37 pmSeattle/Tacoma Intl

13h 02m

2 stops

DLH10:39 amDuluth Intl

$389

United Airlines

May 27

DLH6:10 pmDuluth Intl

7h 49m

1 stop

SEA11:59 pmSeattle/Tacoma Intl

May 30

SEA7:00 amSeattle/Tacoma Intl

8h 34m

1 stop

DLH5:34 pmDuluth Intl

$409

Fly from

Fly to

Route

Depart

Return

Price

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 5/27

6:10 pm-11:59 pm

1 stop7h 49m

Seattle/Tacoma Intl

Sat 5/30

7:00 am-5:34 pm

1 stop8h 34m

$409

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 5/27

5:00 am-4:20 pm

2 stops13h 20m

Seattle/Tacoma Intl

Sat 5/30

7:00 am-5:34 pm

1 stop8h 34m

$414

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 5/27

11:18 am-11:10 pm

2 stops13h 52m

Seattle/Tacoma Intl

Sat 5/30

7:05 pm-10:43 am

2 stops13h 38m

$419

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 8/21

5:00 am-2:22 pm

2 stops11h 22m

Seattle/Tacoma Intl

Sat 8/29

7:35 pm-10:30 am

2 stops12h 55m

$431

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Thu 8/6

6:10 pm-11:59 pm

1 stop7h 49m

Seattle/Tacoma Intl

Mon 8/10

5:04 pm-10:30 am

2 stops15h 26m

$443

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 3/21

3:07 pm-10:45 pm

1 stop9h 38m

Seattle/Tacoma Intl

Fri 3/27

11:59 pm-10:43 am

1 stop8h 44m

$468

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sun 3/22

4:32 pm-11:40 pm

1 stop9h 08m

Seattle/Tacoma Intl

Fri 3/27

11:59 pm-11:56 am

1 stop9h 57m

$474

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 6/6

4:30 pm-8:41 pm

1 stop6h 11m

Seattle/Tacoma Intl

Sat 6/13

11:53 pm-11:38 pm

1 stop21h 45m

$476

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 6/6

4:30 pm-8:41 pm

1 stop6h 11m

Seattle/Tacoma Intl

Thu 6/11

9:30 am-11:38 pm

2 stops12h 08m

$485

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Wed 5/27

11:18 am-11:10 pm

2 stops13h 52m

Seattle/Tacoma Intl

Sat 5/30

7:40 am-11:08 pm

2 stops13h 28m

$493

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 19 resultsSorted by cheapest first

How to get the cheapest flight ticket from Duluth to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the typical price of a round-trip flight between Duluth and Seattle?

What is the cheapest month to fly to Seattle?

In general, September is the cheapest month to fly from Duluth to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $258. If you don’t want to visit Seattle in September, then you should wait until December to fly from Duluth, when ticket prices are also cheap, with an average price of $273.

When to book flights from Duluth to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Duluth to Seattle according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Duluth to Seattle (DLH to SEA) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Duluth to Seattle

Fastest flight time	6h 14m
Direct flights	None

The fastest flight from Duluth to Seattle takes 6h 14m

There are no direct flights from Duluth to Seattle. There are no popular flight routes from Duluth to Seattle.

Search flight deals

How far is Duluth Intl to Seattle/Tacoma Intl by plane?
The distance between Duluth Intl and Seattle/Tacoma Intl is about 1410.5 mi. Flights usually cover this in 6h 14m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?
Prices for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport refresh daily.
How many operators does momondo search for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport?
The number of operators available for flights from Duluth Intl Airport to Seattle/Tacoma Intl Airport is 2 as of March 2026.
How old do you have to be to fly from Duluth Intl Airport to Seattle/Tacoma Intl Airport?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Duluth Intl Airport to Seattle/Tacoma Intl Airport.
What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?
The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Duluth to Seattle?
Based on momondo bookings for flights between Duluth and Seattle, the leading airline is Delta, making up 71% of the total bookings. Other popular airlines include United Airlines with 29%.

Best airlines flying from Duluth to Seattle

Compare and see reviews for airlines that fly from Duluth to Seattle with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $258	Free Cancellation	Rating 7.4 9,377 reviews		Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.9 8,242 reviews		Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Redmond

Cle Elum

Puyallup

Lakewood

Tukwila

Federal Way

Fife

Westport

Kirkland

Centralia

Tumwater

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Why should I use momondo to find a flight deal from Duluth to Seattle?

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Can I find flights from Duluth to Seattle with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Duluth to Seattle flights to just show those with flexible booking policies.

How can momondo help me find flights from Duluth to Seattle?

Once you have performed a search for Duluth to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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