What airlines fly to Seattle?

Delta, United Airlines and Sun Country Air are the top three most popular airlines that fly to Seattle from Duluth according to our data. Delta is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

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 3 as of October 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 2025/26

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Find the cheapest flights from Duluth to Seattle

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One-way

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Cheap round-trip flights

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3:06 pm - 10:28 pmDLH-SEA

9h 22m1 stop

11:34 pm - 10:38 amSEA-DLH

9h 04m1 stop

$308United Airlines

Find Deal

Sat, Nov 1 - Tue, Nov 4

11:14 am - 12:59 amDLH-SEA

15h 45m2 stops

11:34 pm - 10:38 amSEA-DLH

9h 04m1 stop

$314United Airlines

Find Deal

Sat, Nov 1 - Tue, Nov 4

3:06 pm - 12:59 amDLH-SEA

11h 53m2 stops

7:28 pm - 10:38 amSEA-DLH

13h 10m2 stops

$319United Airlines

Find Deal

Sat, Nov 1 - Tue, Nov 4

4:20 pm - 7:00 pmDLH-SEA

28h 40m2 stops

3:45 pm - 11:02 pmSEA-DLH

5h 17m1 stop

$332Delta

Find Deal

Fri, Feb 27 - Tue, Mar 3

11:14 am - 6:52 pmDLH-SEA

9h 38m1 stop

11:30 pm - 10:38 amSEA-DLH

9h 08m1 stop

$338United Airlines

Find Deal

Fri, Nov 14 - Mon, Nov 17

3:06 pm - 10:28 pmDLH-SEA

9h 22m1 stop

5:20 pm - 10:38 amSEA-DLH

15h 18m2 stops

$344United Airlines

Find Deal

Fri, Nov 14 - Mon, Nov 17

4:20 pm - 9:44 amDLH-SEA

19h 24m2 stops

3:45 pm - 11:02 pmSEA-DLH

5h 17m1 stop

$347Delta

Find Deal

Fri, Feb 27 - Tue, Mar 3

11:14 am - 10:30 pmDLH-SEA

13h 16m2 stops

5:20 pm - 10:38 amSEA-DLH

15h 18m2 stops

$349United Airlines

Find Deal

Fri, Nov 14 - Mon, Nov 17

12:00 pm - 4:19 pmDLH-SEA

6h 19m1 stop

6:05 am - 3:24 pmSEA-DLH

7h 19m1 stop

$363Delta

Find Deal

Fri, Feb 27 - Tue, Mar 3

4:20 pm - 8:32 pmDLH-SEA

6h 12m1 stop

3:45 pm - 11:02 pmSEA-DLH

5h 17m1 stop

$388Delta

Find Deal

Sat, Jan 31 - Fri, Feb 6

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

Nov 1

DLH3:06 pmDuluth Intl

9h 22m

1 stop

SEA10:28 pmSeattle/Tacoma Intl

Nov 4

SEA11:34 pmSeattle/Tacoma Intl

9h 04m

1 stop

DLH10:38 amDuluth Intl

$308

Find similar

United Airlines

Nov 1

DLH11:14 amDuluth Intl

15h 45m

2 stops

SEA12:59 amSeattle/Tacoma Intl

Nov 4

SEA11:34 pmSeattle/Tacoma Intl

9h 04m

1 stop

DLH10:38 amDuluth Intl

$314

Find similar

United Airlines

Nov 1

DLH3:06 pmDuluth Intl

11h 53m

2 stops

SEA12:59 amSeattle/Tacoma Intl

Nov 4

SEA7:28 pmSeattle/Tacoma Intl

13h 10m

2 stops

DLH10:38 amDuluth Intl

$319

Find similar

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Feb 27

DLH4:20 pmDuluth Intl

28h 40m

2 stops

SEA7:00 pmSeattle/Tacoma Intl

Mar 3

SEA3:45 pmSeattle/Tacoma Intl

5h 17m

1 stop

DLH11:02 pmDuluth Intl

$332

Find similar

Delta

Feb 27

DLH4:20 pmDuluth Intl

19h 24m

2 stops

SEA9:44 amSeattle/Tacoma Intl

Mar 3

SEA3:45 pmSeattle/Tacoma Intl

5h 17m

1 stop

DLH11:02 pmDuluth Intl

$347

Find similar

Delta

Feb 27

DLH12:00 pmDuluth Intl

6h 19m

1 stop

SEA4:19 pmSeattle/Tacoma Intl

Mar 3

SEA6:05 amSeattle/Tacoma Intl

7h 19m

1 stop

DLH3:24 pmDuluth Intl

$363

Find similar

Fly from

Fly to

Route

Depart

Return

Price

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 11/1

3:06 pm-10:28 pm

1 stop9h 22m

Seattle/Tacoma Intl

Tue 11/4

11:34 pm-10:38 am

1 stop9h 04m

$308

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 11/1

11:14 am-12:59 am

2 stops15h 45m

Seattle/Tacoma Intl

Tue 11/4

11:34 pm-10:38 am

1 stop9h 04m

$314

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 11/1

3:06 pm-12:59 am

2 stops11h 53m

Seattle/Tacoma Intl

Tue 11/4

7:28 pm-10:38 am

2 stops13h 10m

$319

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 2/27

4:20 pm-7:00 pm

2 stops28h 40m

Seattle/Tacoma Intl

Tue 3/3

3:45 pm-11:02 pm

1 stop5h 17m

$332

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 11/14

11:14 am-6:52 pm

1 stop9h 38m

Seattle/Tacoma Intl

Mon 11/17

11:30 pm-10:38 am

1 stop9h 08m

$338

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 11/14

3:06 pm-10:28 pm

1 stop9h 22m

Seattle/Tacoma Intl

Mon 11/17

5:20 pm-10:38 am

2 stops15h 18m

$344

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 2/27

4:20 pm-9:44 am

2 stops19h 24m

Seattle/Tacoma Intl

Tue 3/3

3:45 pm-11:02 pm

1 stop5h 17m

$347

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 11/14

11:14 am-10:30 pm

2 stops13h 16m

Seattle/Tacoma Intl

Mon 11/17

5:20 pm-10:38 am

2 stops15h 18m

$349

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Fri 2/27

12:00 pm-4:19 pm

1 stop6h 19m

Seattle/Tacoma Intl

Tue 3/3

6:05 am-3:24 pm

1 stop7h 19m

$363

DuluthSeattle

DLH - SEA

DLHSEA

Duluth Intl

Sat 1/31

4:20 pm-8:32 pm

1 stop6h 12m

Seattle/Tacoma Intl

Fri 2/6

3:45 pm-11:02 pm

1 stop5h 17m

$388

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 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 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 $336.

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

Direct flights	None

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 12m, 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 3 as of October 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 68% of the total bookings. Other popular airlines include United Airlines with 17% and Sun Country Air with 14%.

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 6.9 333 reviews	Search Sun Country Air flights
United Airlines	PriceFrom $258	Free Cancellation	Rating 7.4 8,990 reviews	Search United Airlines flights
Delta	PriceFrom $258	Free Cancellation	Rating 7.9 7,977 reviews	Search Delta flights

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SeaTac

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Renton

Olympia

Lynnwood

Kent

Marysville

Puyallup

Federal Way

Tukwila

Lakewood

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Fife

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Shoreline

Cle Elum

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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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