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

Delta and United Airlines are the most popular carriers 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 July 2025.

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.

$107 Cheap Flights from Duluth to Seattle in 2025

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

Prices are currently low for flights on this route. Typical prices usually range from $344 to $503. The lowest price recently found on this route was $258.

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Find the cheapest flights from Duluth to Seattle

Round-trip

One-way

Last minute

Cheap round-trip flights

5:10 am - 8:48 amDLH-SEA

5h 38m1 stop

11:40 pm - 10:02 amSEA-DLH

8h 22m1 stop

$258Delta

Find Deal

Thu, Sep 4 - Fri, Sep 12

5:10 am - 8:48 amDLH-SEA

5h 38m1 stop

11:55 pm - 10:15 amSEA-DLH

8h 20m1 stop

$268Delta

Find Deal

Thu, Sep 4 - Sun, Sep 7

5:10 am - 8:48 amDLH-SEA

5h 38m1 stop

11:55 pm - 10:15 amSEA-DLH

8h 20m1 stop

$283Delta

Find Deal

Mon, Sep 1 - Mon, Sep 8

5:10 am - 8:48 amDLH-SEA

5h 38m1 stop

11:40 pm - 10:02 amSEA-DLH

8h 22m1 stop

$293Delta

Find Deal

Tue, Sep 2 - Fri, Sep 12

5:10 am - 6:55 pmDLH-SEA

15h 45m2 stops

11:55 pm - 10:15 amSEA-DLH

8h 20m1 stop

$307Delta

Find Deal

Sat, Aug 30 - Mon, Sep 8

5:10 am - 8:48 amDLH-SEA

5h 38m1 stop

11:55 pm - 10:07 amSEA-DLH

8h 12m1 stop

$312Delta

Find Deal

Sat, Aug 30 - Wed, Sep 10

5:10 am - 6:55 pmDLH-SEA

15h 45m2 stops

11:40 pm - 10:02 amSEA-DLH

8h 22m1 stop

$317Delta

Find Deal

Sat, Aug 30 - Fri, Sep 12

5:10 am - 8:48 amDLH-SEA

5h 38m1 stop

7:25 am - 10:02 amSEA-DLH

24h 37m2 stops

$327Delta

Find Deal

Sun, Aug 31 - Fri, Sep 12

3:10 pm - 10:20 pmDLH-SEA

9h 10m1 stop

5:14 pm - 10:45 amSEA-DLH

15h 31m2 stops

$344United Airlines

Find Deal

Thu, Sep 4 - Tue, Sep 9

11:20 am - 10:59 pmDLH-SEA

13h 39m2 stops

5:14 pm - 10:45 amSEA-DLH

15h 31m2 stops

$349United Airlines

Find Deal

Sat, Aug 30 - Sat, Sep 13

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Sep 4

DLH5:10 amDuluth Intl

5h 38m

1 stop

SEA8:48 amSeattle/Tacoma Intl

Sep 12

SEA11:40 pmSeattle/Tacoma Intl

8h 22m

1 stop

DLH10:02 amDuluth Intl

$258

Find similar

Delta

Sep 4

DLH5:10 amDuluth Intl

5h 38m

1 stop

SEA8:48 amSeattle/Tacoma Intl

Sep 7

SEA11:55 pmSeattle/Tacoma Intl

8h 20m

1 stop

DLH10:15 amDuluth Intl

$268

Find similar

Delta

Sep 1

DLH5:10 amDuluth Intl

5h 38m

1 stop

SEA8:48 amSeattle/Tacoma Intl

Sep 8

SEA11:55 pmSeattle/Tacoma Intl

8h 20m

1 stop

DLH10:15 amDuluth Intl

$283

Find similar

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

Sep 4

DLH3:10 pmDuluth Intl

9h 10m

1 stop

SEA10:20 pmSeattle/Tacoma Intl

Sep 9

SEA5:14 pmSeattle/Tacoma Intl

15h 31m

2 stops

DLH10:45 amDuluth Intl

$344

Find similar

United Airlines

Aug 30

DLH11:20 amDuluth Intl

13h 39m

2 stops

SEA10:59 pmSeattle/Tacoma Intl

Sep 13

SEA5:14 pmSeattle/Tacoma Intl

15h 31m

2 stops

DLH10:45 amDuluth Intl

$349

Find similar

United Airlines

Aug 31

DLH8:00 amDuluth Intl

16h 52m

3 stops

SEA10:52 pmSeattle/Tacoma Intl

Sep 9

SEA5:35 pmSeattle/Tacoma Intl

15h 10m

2 stops

DLH10:45 amDuluth Intl

$354

Find similar

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 November to fly from Duluth, when ticket prices are also cheap, with an average price of $308.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Duluth is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $369. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Duluth because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $571.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Duluth in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $495 when looking at flights departing in the afternoon. Flights to Seattle are more costly at noon, with an average ticket price of $505. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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

Best Price Found	$353
Fastest flight time	5h 38m
Direct flights	None
Airports in Seattle	1 airport

The best one-way flight to Seattle from Duluth in the past 72 hours is $353. The best round-trip flight deal from Duluth to Seattle found on momondo in the last 72 hours is $258.

The fastest flight from Duluth to Seattle takes 5h 38m

There are no direct flights from Duluth to Seattle. Popular non-direct route for this connection is Duluth Intl Airport - Seattle/Tacoma Intl Airport.

There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)

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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 5h 38m, 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 July 2025.
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 81% of the total bookings. Other popular airlines include Sun Country Air with 19%.

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 6.9 335 reviews		Search Sun Country Air flights
Delta	PriceFrom $248	Free Cancellation	Rating 8.0 7,956 reviews		Search Delta flights

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SeaTac

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Olympia

Renton

Kent

Federal Way

Lynnwood

Puyallup

Marysville

Tukwila

Kirkland

Shoreline

Lakewood

Fife

Cle Elum

Centralia

Westport

Redmond

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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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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.