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.

Aer Lingus Flights to Seattle

10 Aer Lingus flights head to Seattle on average each week. Most will be flying from London Heathrow to Seattle, the most popular route that Aer Lingus operates to Seattle. Prices vary based on when and where you fly from - the cheapest Aer Lingus flight to Seattle found in the past 3 days on momondo was €480, departing from Dublin. Aer Lingus is the most popular choice on momondo for this route and has been scored 7.2/10 by 1,366 of our users.

Icelandair Flights to Seattle

Icelandair flights to Seattle can start from as low as €422 (return, from Dublin, found in the last 72 hours). Over 13 flights that Icelandair operates to Seattle in a normal week, prices can vary significantly. The most popular Icelandair flight to Seattle is from Denver Intl. Icelandair has been rated 7.1/10 by momondo users, in 572 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 23h 05m.

€316 Cheap Flights to Seattle in 2025/26

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Find the cheapest flights from Ireland to Seattle

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11:30 - 17:00DUB-SEA

13h 30m1 stop

14:35 - 10:15SEA-DUB

11h 40m1 stop

€399Icelandair

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Mon, 2 Feb - Mon, 16 Feb

11:30 - 17:00DUB-SEA

13h 30m1 stop

14:35 - 10:15SEA-DUB

11h 40m1 stop

€405Icelandair

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Wed, 28 Jan - Sat, 7 Feb

08:50 - 16:55DUB-SEA

16h 05m1 stop

13:35 - 14:15SEA-DUB

16h 40m1 stop

€424American Airlines

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Wed, 28 Jan - Sat, 7 Feb

05:55 - 11:45DUB-SEA

13h 50m1 stop

07:20 - 08:45SEA-DUB

17h 25m1 stop

€424KLM

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Fri, 21 Nov - Fri, 5 Dec

08:50 - 16:55DUB-SEA

16h 05m1 stop

13:35 - 09:50SEA-DUB

12h 15m1 stop

€425American Airlines

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Wed, 28 Jan - Sat, 7 Feb

05:55 - 11:45DUB-SEA

13h 50m1 stop

09:45 - 12:40SEA-DUB

18h 55m2 stops

€426KLM

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Fri, 21 Nov - Fri, 5 Dec

08:50 - 21:47DUB-SEA

20h 57m2 stops

18:50 - 17:40SEA-DUB

14h 50m1 stop

€436British Airways

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Wed, 28 Jan - Sat, 7 Feb

16:30 - 18:20DUB-SEA

9h 50mdirect

20:05 - 13:10SEA-DUB

9h 05mdirect

€450Aer Lingus

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Fri, 21 Nov - Fri, 5 Dec

16:30 - 18:20DUB-SEA

9h 50mdirect

18:50 - 19:05SEA-DUB

16h 15m1 stop

€495Aer Lingus

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Mon, 15 Dec - Wed, 7 Jan

20:05 - 17:55SNN-SEA

28h 50m1 stop

13:48 - 16:45SEA-SNN

19h 57m2 stops

€565British Airways

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Wed, 11 Mar - Sun, 15 Mar

Fly from

Route

Depart

Return

Price

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 2/2

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Mon 16/2

14:35-10:15

1 stop11h 40m

€399

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 28/1

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Sat 7/2

14:35-10:15

1 stop11h 40m

€405

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 28/1

08:50-16:55

1 stop16h 05m

Seattle/Tacoma Intl

Sat 7/2

13:35-14:15

1 stop16h 40m

€424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 21/11

05:55-11:45

1 stop13h 50m

Seattle/Tacoma Intl

Fri 5/12

07:20-08:45

1 stop17h 25m

€424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 28/1

08:50-16:55

1 stop16h 05m

Seattle/Tacoma Intl

Sat 7/2

13:35-09:50

1 stop12h 15m

€425

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 21/11

05:55-11:45

1 stop13h 50m

Seattle/Tacoma Intl

Fri 5/12

09:45-12:40

2 stops18h 55m

€426

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 28/1

08:50-21:47

2 stops20h 57m

Seattle/Tacoma Intl

Sat 7/2

18:50-17:40

1 stop14h 50m

€436

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 21/11

16:30-18:20

Nonstop9h 50m

Seattle/Tacoma Intl

Fri 5/12

20:05-13:10

Nonstop9h 05m

€450

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 15/12

16:30-18:20

Nonstop9h 50m

Seattle/Tacoma Intl

Wed 7/1

18:50-19:05

1 stop16h 15m

€495

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Wed 11/3

20:05-17:55

1 stop28h 50m

Seattle/Tacoma Intl

Sun 15/3

13:48-16:45

2 stops19h 57m

€565

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 €645. Flights from Ireland to Seattle on a Monday will generally be more expensive and average around €807. 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 €575. Flights in the afternoon are often more expensive, with an average ticket price of €707.

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 €617 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 €519 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	14% cheaper	Flying from Dublin to Seattle costs on average just €536 in February
MOST EXPENSIVE MONTH TO FLY TO SEATTLE FROM DUBLIN	July	31% more expensive	It costs about €810 for flights to Seattle from Dublin in July
MOST POPULAR MONTH TO FLY TO SEATTLE FROM DUBLIN	August	200% 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	€316
Best Round-Trip Price	€399
Fastest flight time	12h 50m
Popular in	July

The best one-way flight price to Seattle from Ireland in the last 72 hours is €316 (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 €399 (Dublin to Seattle/Tacoma Intl).

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The fastest flight to Seattle from Ireland takes 12h 50m (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 €617. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as €450 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 November 2025, there are 4 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.

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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.