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 November 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.

$378 Cheap Flights from Duluth to Seattle in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

5:50 am - 11:47 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 57m1 stop Chicago O'Hare Intl

10:52 am - 9:50 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

8h 58m1 stop Chicago O'Hare Intl

$378United Airlines

Thu, Jan 21 - Sun, Jan 24

5:50 am - 4:38 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

12h 48m2 stops Chicago O'Hare Intl San Francisco

10:52 am - 9:50 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

8h 58m1 stop Chicago O'Hare Intl

$384United Airlines

Thu, Jan 21 - Sun, Jan 24

11:00 am - 6:46 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 46m1 stop Chicago O'Hare Intl

2:05 pm - 11:09 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 04m1 stop Chicago O'Hare Intl

$397United Airlines

Fri, Dec 4 - Tue, Dec 8

11:00 am - 6:46 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

9h 46m1 stop Chicago O'Hare Intl

9:01 am - 11:09 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

12h 08m2 stops San Francisco Chicago O'Hare Intl

$402United Airlines

Fri, Dec 4 - Tue, Dec 8

12:06 pm - 5:10 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 04m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$428Delta

Sun, Nov 22 - Fri, Nov 27

7:00 am - 12:29 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 29m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$428Delta

Mon, Nov 23 - Fri, Nov 27

4:25 pm - 8:46 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

6h 21m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$428Delta

Thu, Nov 19 - Fri, Nov 27

5:04 am - 10:42 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 38m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$428Delta

Fri, Nov 20 - Fri, Nov 27

7:00 am - 12:29 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 29m1 stop Minneapolis St Paul

1:50 pm - 8:54 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

5h 04m1 stop Minneapolis St Paul

$428Delta

Fri, Nov 20 - Thu, Nov 26

5:04 am - 10:42 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 38m1 stop Minneapolis St Paul

1:50 pm - 8:54 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

5h 04m1 stop Minneapolis St Paul

$428Delta

Mon, Nov 23 - Thu, Nov 26

Cheap last minute flights

Enter your travel dates to find the best prices.

5:04 am - 10:42 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 38m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$483Delta

Fri, Nov 13 - Sat, Nov 21

12:09 pm - 5:10 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 01m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$483Delta

Sat, Nov 14 - Sat, Nov 21

5:04 am - 10:42 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 38m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$483Delta

Thu, Nov 12 - Sat, Nov 21

5:04 am - 10:42 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 38m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$483Delta

Sun, Nov 15 - Sat, Nov 21

4:25 pm - 8:46 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

6h 21m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$513Delta

Wed, Nov 11 - Sat, Nov 21

5:04 am - 10:42 amDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 38m1 stop Minneapolis St Paul

6:00 am - 3:45 pmSEA Seattle/Tacoma Intl-DLH Duluth Intl

7h 45m1 stop Minneapolis St Paul

$513Delta

Tue, Nov 10 - Sat, Nov 21

3:06 pm - 11:07 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

10h 01m1 stop Chicago O'Hare Intl

10:56 pm - 10:41 amSEA Seattle/Tacoma Intl-DLH Duluth Intl

9h 45m1 stop Chicago O'Hare Intl

$546United Airlines

Thu, Nov 12 - Thu, Nov 19

11:16 am - 11:18 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

14h 02m2 stops Chicago O'Hare Intl San Francisco

10:56 pm - 10:41 amSEA Seattle/Tacoma Intl-DLH Duluth Intl

9h 45m1 stop Chicago O'Hare Intl

$552United Airlines

Thu, Nov 12 - Thu, Nov 19

6:23 am - 12:19 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 56m1 stop Chicago O'Hare Intl

10:56 pm - 10:41 amSEA Seattle/Tacoma Intl-DLH Duluth Intl

9h 45m1 stop Chicago O'Hare Intl

$593United Airlines

Sat, Nov 14 - Sun, Nov 22

6:23 am - 12:19 pmDLH Duluth Intl-SEA Seattle/Tacoma Intl

7h 56m1 stop Chicago O'Hare Intl

10:56 pm - 10:41 amSEA Seattle/Tacoma Intl-DLH Duluth Intl

9h 45m1 stop Chicago O'Hare Intl

$593United Airlines

Fri, Nov 13 - Sun, Nov 22

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

United Airlines flights from Duluth to Seattle

Our best United Airlines deals on Duluth to Seattle flight tickets

United Airlines

Jan 21

DLH5:50 amDuluth Intl

7h 57m

1 stop

SEA11:47 amSeattle/Tacoma Intl

Jan 24

SEA10:52 amSeattle/Tacoma Intl

8h 58m

1 stop

DLH9:50 pmDuluth Intl

$378

United Airlines

Jan 21

DLH5:50 amDuluth Intl

12h 48m

2 stops

SEA4:38 pmSeattle/Tacoma Intl

Jan 24

SEA10:52 amSeattle/Tacoma Intl

8h 58m

1 stop

DLH9:50 pmDuluth Intl

$384

United Airlines

Dec 4

DLH11:00 amDuluth Intl

9h 46m

1 stop

SEA6:46 pmSeattle/Tacoma Intl

Dec 8

SEA2:05 pmSeattle/Tacoma Intl

7h 04m

1 stop

DLH11:09 pmDuluth Intl

$397

Delta flights from Duluth to Seattle

Our best Delta deals on Duluth to Seattle flight tickets

Delta

Nov 19

DLH4:25 pmDuluth Intl

6h 21m

1 stop

SEA8:46 pmSeattle/Tacoma Intl

Nov 27

SEA6:00 amSeattle/Tacoma Intl

7h 45m

1 stop

DLH3:45 pmDuluth Intl

$428

Delta

Nov 25

DLH12:06 pmDuluth Intl

7h 04m

1 stop

SEA5:10 pmSeattle/Tacoma Intl

Dec 2

SEA6:00 amSeattle/Tacoma Intl

8h 05m

1 stop

DLH4:05 pmDuluth Intl

$448

Delta

Nov 12

DLH5:04 amDuluth Intl

7h 38m

1 stop

SEA10:42 amSeattle/Tacoma Intl

Nov 21

SEA6:00 amSeattle/Tacoma Intl

7h 45m

1 stop

DLH3:45 pmDuluth Intl

$483

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Thu 1/21

5:50 am-11:47 am

1 stop7h 57m

Seattle/Tacoma Intl

Sun 1/24

10:52 am-9:50 pm

1 stop8h 58m

$378

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Thu 1/21

5:50 am-4:38 pm

2 stops12h 48m

Seattle/Tacoma Intl

Sun 1/24

10:52 am-9:50 pm

1 stop8h 58m

$384

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Fri 12/4

11:00 am-6:46 pm

1 stop9h 46m

Seattle/Tacoma Intl

Tue 12/8

2:05 pm-11:09 pm

1 stop7h 04m

$397

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Fri 12/4

11:00 am-6:46 pm

1 stop9h 46m

Seattle/Tacoma Intl

Tue 12/8

9:01 am-11:09 pm

2 stops12h 08m

$402

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Sun 11/22

12:06 pm-5:10 pm

1 stop7h 04m

Seattle/Tacoma Intl

Fri 11/27

6:00 am-3:45 pm

1 stop7h 45m

$428

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Mon 11/23

7:00 am-12:29 pm

1 stop7h 29m

Seattle/Tacoma Intl

Fri 11/27

6:00 am-3:45 pm

1 stop7h 45m

$428

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Thu 11/19

4:25 pm-8:46 pm

1 stop6h 21m

Seattle/Tacoma Intl

Fri 11/27

6:00 am-3:45 pm

1 stop7h 45m

$428

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Fri 11/20

5:04 am-10:42 am

1 stop7h 38m

Seattle/Tacoma Intl

Fri 11/27

6:00 am-3:45 pm

1 stop7h 45m

$428

Quickest round-trip

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Fri 11/20

7:00 am-12:29 pm

1 stop7h 29m

Seattle/Tacoma Intl

Thu 11/26

1:50 pm-8:54 pm

1 stop5h 04m

$428

DuluthSeattle

DLH Duluth Intl - SEA Seattle/Tacoma Intl

DLHSEA

Duluth Intl

Mon 11/23

5:04 am-10:42 am

1 stop7h 38m

Seattle/Tacoma Intl

Thu 11/26

1:50 pm-8:54 pm

1 stop5h 04m

$428

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 cheapest month to fly to Seattle?

In general, June 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 $0. If you don’t want to visit Seattle in June, then you should wait until May to fly from Duluth, when ticket prices are also cheap, with an average price of $0.

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	$378
Fastest flight time	7h 04m
Direct flights	None

The best flight deal from Duluth to Seattle found on momondo in the last 72 hours is $378

The fastest flight from Duluth to Seattle takes 7h 04m

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

Search flight deals

Frequently asked questions about flying from Duluth to Seattle

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 7h 04m, 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 November 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 54% of the total bookings. Other popular airlines include United Airlines with 46%.

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 $307	Free Cancellation	Rating 7.3 10,476 reviews		Search United Airlines flights
Delta	PriceFrom $328	Free Cancellation	Rating 7.8 8,700 reviews		Search Delta flights

Tacoma

Leavenworth

SeaTac

Ocean Shores

Renton

Kent

Olympia

Federal Way

Redmond

Lakewood

Lynnwood

Fife

Puyallup

Tukwila

Cle Elum

Marysville

Lacey

Kirkland

Centralia

Shoreline

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Duluth to Seattle. momondo saves you time and could save you money on your trip.

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.