Which airlines fly to Seattle?

Based on our data, the most popular airlines that fly to Seattle from Ireland are Aer Lingus, Icelandair and British Airways. There may also be other airline options depending on where in Ireland you’re flying from.

Icelandair Flights to Seattle

11 Icelandair flights head to Seattle on average each week. Most will be flying from Boise Air Term. Gowen Fld to Seattle, the most popular route that Icelandair operates to Seattle. Prices vary based on when and where you fly from - the cheapest Icelandair flight to Seattle found in the past 3 days on momondo was €419, departing from Dublin. Icelandair is the most popular choice on momondo for this route and has been scored 7.0/10 by 560 of our users.

British Airways Flights to Seattle

British Airways flights to Seattle can start from as low as €503 (return, from Dublin, found in the last 72 hours). Over 29 flights that British Airways operates to Seattle in a normal week, prices can vary significantly. The most popular British Airways flight to Seattle is from Portland. British Airways has been rated 6.7/10 by momondo users, in 7,464 reviews.

How long does it take to fly to Seattle?

On average, it takes 9h 39m to fly from Ireland to Seattle if you fly out of Dublin (the most popular airport in Ireland) and into Seattle/Tacoma Intl (the most popular airport in Seattle). If you’re flying out of Cork and into Seattle/Tacoma Intl, then the flight time is around 38h 49m.

€314 Cheap Flights to Seattle in 2025/26

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Find the cheapest flights from Ireland to Seattle

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Cheap return flights

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17:15 - 12:45DUB-SEA

26h 30m1 stop

07:19 - 08:45SEA-DUB

17h 26m1 stop

€418Multiple Airlines

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Thu, 30 Oct - Sat, 8 Nov

17:15 - 12:45DUB-SEA

26h 30m1 stop

14:05 - 15:45SEA-DUB

17h 40m1 stop

€419Multiple Airlines

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Thu, 30 Oct - Wed, 5 Nov

20:40 - 16:55DUB-SEA

28h 15m1 stop

18:50 - 07:55SEA-DUB

29h 05m1 stop

€429British Airways

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Thu, 5 Feb - Wed, 18 Feb

08:50 - 22:20DUB-SEA

21h 30m2 stops

08:20 - 09:40SEA-DUB

17h 20m2 stops

€431American Airlines

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Thu, 5 Feb - Wed, 18 Feb

12:55 - 12:40DUB-SEA

30h 45m1 stop

11:42 - 16:50SEA-DUB

21h 08m2 stops

€432American Airlines

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Fri, 31 Oct - Sun, 16 Nov

11:30 - 17:00DUB-SEA

13h 30m1 stop

14:35 - 10:15SEA-DUB

11h 40m1 stop

€434Icelandair

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Wed, 12 Nov - Thu, 27 Nov

16:30 - 18:20DUB-SEA

9h 50mdirect

20:05 - 13:10SEA-DUB

9h 05mdirect

€436Aer Lingus

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Mon, 24 Nov - Mon, 8 Dec

16:30 - 18:20DUB-SEA

9h 50mdirect

20:05 - 13:10SEA-DUB

9h 05mdirect

€438Aer Lingus

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Fri, 28 Nov - Wed, 10 Dec

20:35 - 11:30DUB-SEA

22h 55m1 stop

11:42 - 15:25SEA-DUB

19h 43m2 stops

€448British Airways

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Fri, 14 Nov - Mon, 24 Nov

11:30 - 17:00DUB-SEA

13h 30m1 stop

14:35 - 10:15SEA-DUB

11h 40m1 stop

€467Icelandair

Find Deal

Fri, 14 Nov - Wed, 19 Nov

Fly from

Route

Depart

Return

Price

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 30/10

17:15-12:45

1 stop26h 30m

Seattle/Tacoma Intl

Sat 8/11

07:19-08:45

1 stop17h 26m

€418

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 30/10

17:15-12:45

1 stop26h 30m

Seattle/Tacoma Intl

Wed 5/11

14:05-15:45

1 stop17h 40m

€419

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 5/2

20:40-16:55

1 stop28h 15m

Seattle/Tacoma Intl

Wed 18/2

18:50-07:55

1 stop29h 05m

€429

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 5/2

08:50-22:20

2 stops21h 30m

Seattle/Tacoma Intl

Wed 18/2

08:20-09:40

2 stops17h 20m

€431

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 31/10

12:55-12:40

1 stop30h 45m

Seattle/Tacoma Intl

Sun 16/11

11:42-16:50

2 stops21h 08m

€432

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 12/11

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Thu 27/11

14:35-10:15

1 stop11h 40m

€434

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 24/11

16:30-18:20

Nonstop9h 50m

Seattle/Tacoma Intl

Mon 8/12

20:05-13:10

Nonstop9h 05m

€436

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 28/11

16:30-18:20

Nonstop9h 50m

Seattle/Tacoma Intl

Wed 10/12

20:05-13:10

Nonstop9h 05m

€438

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 14/11

20:35-11:30

1 stop22h 55m

Seattle/Tacoma Intl

Mon 24/11

11:42-15:25

2 stops19h 43m

€448

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 14/11

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Wed 19/11

14:35-10:15

1 stop11h 40m

€467

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

Seattle flights insights and trends

Explore insights for your Seattle flight to craft the best travel plan

Prices

Other information

What is the cheapest month to fly to Seattle?

If you’re not able to fly to Seattle in February, then November is your next best option. Flight prices from Ireland to Seattle during November average around €547.

What is the absolute cheapest flight to Seattle?

See prices from:

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

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as €640. Flights from Ireland to Seattle on a Monday will generally be more expensive and average around €801. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

Our data shows that the cheapest Ireland to Seattle flights are usually those with departure times in the morning. Our users have found flights to Seattle in the morning for as low as €571. Flights in the afternoon are often more expensive, with an average ticket price of €699.

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around €613 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as €515 on momondo.

Cheapest flights to Seattle/Tacoma Intl

Find the cheapest flights to Seattle/Tacoma Intl from your nearest city or airport

Find flights from Dublin to Seattle

CHEAPEST MONTH TO FLY TO SEATTLE FROM DUBLIN	February	15% cheaper	Flying from Dublin to Seattle costs on average just €526 in February
MOST EXPENSIVE MONTH TO FLY TO SEATTLE FROM DUBLIN	July	33% more expensive	It costs about €821 for flights to Seattle from Dublin in July
MOST POPULAR MONTH TO FLY TO SEATTLE FROM DUBLIN	August	274% more users visited	More momondo users searched in flights to Seattle from Dublin in August than any other month

Cheap Seattle flight deals and tips

Summary info about Seattle flight prices, duration and airlines

Best One-Way Price	€314
Best Round-Trip Price	€418
Fastest flight time	18h 15m
Popular in	July

The best one-way flight price to Seattle from Ireland in the last 72 hours is €314 (Dublin to Seattle/Tacoma Intl).

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The best round-trip flight price to Seattle from Ireland in the last 72 hours is €418 (Dublin to Seattle/Tacoma Intl).

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The fastest flight to Seattle from Ireland takes 18h 15m (Dublin to Seattle/Tacoma Intl).

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July has the highest demand for flights to Seattle, with a 19% price increase on average.

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Frequently asked questions about flying to Seattle

How far in advance should I book a flight to Seattle?

We recommend purchasing flights from Ireland to Seattle 56 days ahead of your departure date because this is when momondo users tend to see the best flight rates. On average, our users have found flights to Seattle for €613. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as €447 on momondo.

Is there an alternative airport near Seattle?

Seattle Lake Union Spb Airport, Seattle King County/Boeing Airport, Kenmore Air Harbor Airport, Everett Paine Field Airport or Lopez Island Airport can be an alternative airport used for travel to Seattle.

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

Prices for flights to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

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

As of October 2025, there are 5 operators available to choose from for flights to Seattle/Tacoma Intl Airport.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel 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 licence 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.

Aberdeen

Lynnwood

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle.

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

Flights to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights to Seattle?

Once all potential Seattle flight options are in front of you momondo lets you sort and filter flights based on preferences such as airline, price and flight times, amongst many other options.

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

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle and alert you when they change.