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 January 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.

$312 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 high for flights on this route. Typical prices usually range from $387 to $404. The lowest price recently found on this route was $925.

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Find the cheapest flights from Duluth to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:05 pm - 10:43 pm

DLH

SEA

9h 38m

1 stop

11:59 pm - 10:43 am

SEA

DLH

8h 44m

1 stop

$925United Airlines

lun., feb. 9 - vie., feb. 13

3:05 pm - 12:56 am

DLH

SEA

11h 51m

2 stops

11:59 pm - 10:43 am

SEA

DLH

8h 44m

1 stop

$992United Airlines

lun., feb. 9 - vie., feb. 13

11:26 am - 6:59 pm

DLH

SEA

9h 33m

1 stop

11:50 pm - 10:44 am

SEA

DLH

8h 54m

1 stop

$1,238United Airlines

dom., jun. 7 - mar., jun. 16

7:53 am - 7:12 pm

DLH

SEA

13h 19m

2 stops

11:50 pm - 10:44 am

SEA

DLH

8h 54m

1 stop

$1,515United Airlines

dom., jun. 7 - mar., jun. 16

3:05 pm - 12:56 am

DLH

SEA

11h 51m

2 stops

7:33 pm - 10:43 am

SEA

DLH

13h 10m

2 stops

$1,526United Airlines

lun., feb. 9 - vie., feb. 13

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

Jan 30

DLH3:05 pmDuluth Intl

9h 38m

1 stop

SEA10:43 pmSeattle/Tacoma Intl

Feb 3

SEA10:58 amSeattle/Tacoma Intl

9h 01m

1 stop

DLH9:59 pmDuluth Intl

$569

United Airlines

Jan 30

DLH3:05 pmDuluth Intl

11h 54m

2 stops

SEA12:59 amSeattle/Tacoma Intl

Feb 3

SEA10:58 amSeattle/Tacoma Intl

9h 01m

1 stop

DLH9:59 pmDuluth Intl

$574

United Airlines

Jan 30

DLH3:05 pmDuluth Intl

11h 54m

2 stops

SEA12:59 amSeattle/Tacoma Intl

Feb 3

SEA8:10 amSeattle/Tacoma Intl

11h 49m

2 stops

DLH9:59 pmDuluth Intl

$580

Fly from

Fly to

Route

Depart

Return

Price

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

lun. 2/9

3:05 pm-10:43 pm

1 stop9h 38m

Seattle/Tacoma Intl

vie. 2/13

11:59 pm-10:43 am

1 stop8h 44m

$925

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

lun. 2/9

3:05 pm-12:56 am

2 stops11h 51m

Seattle/Tacoma Intl

vie. 2/13

11:59 pm-10:43 am

1 stop8h 44m

$992

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

dom. 6/7

11:26 am-6:59 pm

1 stop9h 33m

Seattle/Tacoma Intl

mar. 6/16

11:50 pm-10:44 am

1 stop8h 54m

$1,238

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

dom. 6/7

7:53 am-7:12 pm

2 stops13h 19m

Seattle/Tacoma Intl

mar. 6/16

11:50 pm-10:44 am

1 stop8h 54m

$1,515

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

lun. 2/9

3:05 pm-12:56 am

2 stops11h 51m

Seattle/Tacoma Intl

vie. 2/13

7:33 pm-10:43 am

2 stops13h 10m

$1,526

Flights are sorted by cheapest round-trip flights first.

Sorted 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

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	9h 33m
Direct flights	None

The fastest flight from Duluth to Seattle takes 9h 33m

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 9h 33m, 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 January 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 76% of the total bookings. Other popular airlines include United Airlines with 24%.

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
Sun Country Air	PriceFrom $93	Free Cancellation	Rating 6.9 343 reviews	Search Sun Country Air flights
United Airlines	PriceFrom $258	Free Cancellation	Rating 7.4 9,198 reviews	Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.9 8,113 reviews	Search Delta flights

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SeaTac

Ocean Shores

Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Redmond

Cle Elum

Tukwila

Lakewood

Federal Way

Centralia

Westport

Kirkland

Fife

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.

I’m not ready to book a flight from Duluth to Seattle right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Duluth to Seattle flights. All you need is a valid email address and we will do the rest; it is that quick and easy.