$427 Find Cheap Flights from Ireland to Seattle - Compare and Save

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Cheap Flights from Ireland to Seattle

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ireland to Seattle

Fri, Oct 2 - Fri, Oct 9
Multiple Airlines Logo
6:50 am - 8:40 pmDUB  Dublin-SEA Seattle/Tacoma Intl
21h 50m2 stops London Gatwick Reykjavik Keflavik Intl
Multiple Airlines Logo
3:40 pm - 8:45 pmSEA  Seattle/Tacoma Intl-DUB Dublin
21h 05m2 stops Reykjavik Keflavik Intl London Gatwick
$526Multiple Airlines
Sat, Jan 23 - Thu, Jan 28
Icelandair Logo
11:30 am - 5:00 pmDUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 10:15 amSEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
$528Icelandair
Mon, Jan 18 - Sun, Jan 31
Icelandair Logo
11:30 am - 5:00 pmDUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 10:15 amSEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
$530Icelandair
Thu, Nov 26 - Fri, Dec 4
Icelandair Logo
11:30 am - 5:00 pmDUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 10:15 amSEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
$534Icelandair
Thu, Nov 26 - Fri, Dec 4
Icelandair Logo
11:30 am - 5:00 pmDUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 10:15 amSEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
$535Icelandair
Thu, Nov 26 - Fri, Dec 4
Icelandair Logo
11:30 am - 5:00 pmDUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 10:15 amSEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
$536Icelandair
Wed, Oct 14 - Mon, Oct 19
Multiple Airlines Logo
2:30 pm - 5:55 pmDUB  Dublin-SEA Seattle/Tacoma Intl
35h 25m2 stops London Heathrow Reykjavik Keflavik Intl
Multiple Airlines Logo
3:40 pm - 10:30 pmSEA  Seattle/Tacoma Intl-DUB Dublin
22h 50m2 stops Reykjavik Keflavik Intl London Heathrow
$551Multiple Airlines
Mon, Nov 23 - Sun, Dec 6
Icelandair Logo
11:30 am - 5:00 pmDUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
2:35 pm - 10:15 amSEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
$552Icelandair
Thu, Sep 17 - Fri, Oct 2
Aer Lingus Logo
3:25 pm - 5:10 pmDUB  Dublin-SEA Seattle/Tacoma Intl
9h 45mnonstop
Aer Lingus Logo
7:10 pm - 12:15 pmSEA  Seattle/Tacoma Intl-DUB Dublin
9h 05mnonstop
$687Aer Lingus
Thu, Sep 17 - Thu, Oct 1
Aer Lingus Logo
3:25 pm - 5:10 pmDUB  Dublin-SEA Seattle/Tacoma Intl
9h 45mnonstop
Aer Lingus Logo
7:10 pm - 12:15 pmSEA  Seattle/Tacoma Intl-DUB Dublin
9h 05mnonstop
$687Aer Lingus
Booking Insights

KAYAK's insights & trends for flights to Seattle

Get data-powered insights and trends for flights to Seattle to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest day to fly to Seattle?

Based on KAYAK data, the cheapest day to fly to Seattle is Friday where round-trip tickets can be as cheap as $615. On the other hand, the most expensive day to fly is Sunday, where round-trip prices are $1,226 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is April, where tickets cost $603 on average for return flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Ireland is $1,041 and $1,012 respectively. For one-way flights, the best month to travel is March with an average price of $601.

What is the cheapest time of day to fly to Seattle?

The cheapest time of day to fly to Seattle is generally in the evening, when round-trip flights cost $720 on average. The most expensive time of day to fly to Seattle is generally in the evening, which is peak travel time and where the average cost of a ticket is $720.

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

To get a below average price, you should book around 2 weeks before departure, which saves you about 25% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know

Low season

January

Cheapest flight

$427
Best time to beat the crowds but there is an average 2% increase in price.
Most popular time to fly and prices are also 18% lower on average.
Flight from Dublin to Seattle

FAQs - booking Seattle flights

  • How far is Seattle/Tacoma Intl Airport from central Seattle?

    Central Seattle is 11 miles away from Seattle/Tacoma Intl Airport.

  • What is the name of Seattle’s airport?

    There is only 1 airport in Seattle, called Seattle/Tacoma Intl Airport (SEA). It can also be referred to as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • How much is a flight to Seattle?

    On average, a flight to Seattle costs $670. The cheapest price found on KAYAK in the last 2 weeks cost $663 and departed from Dublin Airport.

  • How does KAYAK find such low prices on flights to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top tips for finding cheap flights to Seattle

  • Looking for cheap airfare to Seattle? 25% of our users found round-trip tickets to Seattle for the following prices or less: From Dublin $665
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Reviews of the top airline flying from Ireland to Seattle

 
Need help choosing which airline to fly with to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.3
Aer LingusOverall score based on 1749 reviews
6.7Food
7.2Comfort
8.1Crew
7.0Entertainment
7.5Boarding
Airline reviews

Overall good. We weren't able to find out about food options for the flight and there was nothing I could eat due to allergies. The biggest problem was getting our checked bag at Logan. Waited an hour!

8.0 ExcellentLaura, Sep 2026
Read more Aer Lingus reviews

Overall good. We weren't able to find out about food options for the flight and there was nothing I could eat due to allergies. The biggest problem was getting our checked bag at Logan. Waited an hour!

I loved both of my flights to Ireland and back to Boston. The only negative was it took over an hour for the baggage to be delivered.

The boarding time for this flight was ridiculous, longest in all my time flying. There was a problem with the original plane so it was switched at the last minute. Not a good substitution. We were delayed in departing. The bathrooms for economy were not adequate. The crew were pleasant but not present in the economy section, in an ~ 8hr flight only twice did they come through offering water, easy to get very dehydrated. I had to go and ask every hour for more water. The seats were cramped, and I have no idea what they did to the coffee but it was undrinkable. The food, was disgusting, utterly inedible, I am stunned by the lack of care and quality with the inflight service, very disappointing, I had expected better from Aer Lingus.

We traveled with my 90 year old mother and she was well cared for by everyone from the wheelchair attendant to crew. Greatly appreciated!

Very comfortable flight. Great service, food options, and entertainment options. With Wi-Fi!

On time departure and arrival at LAX - good inflight entertainment - all basic seats on every airline right now begin to feel small after 10 hours!!

One of the best flights I've been on in a while. Very genuinely friendly staff. Courteous, kind, respectful. On a past flight (not Aer Lingus) I remember being woken up rudely to put my seat forward. Like a child being berated for something. Oddly jarring experience when someone could just tap you gently on the shoulder and gesture kindly. But I noticed the Aer Lingus staff were incredibly patient with everyone on the plane. It's the holiday season and I noticed a lot more elderly customers on the plane than I typically see flying, and the staff went above and beyond with helping accommodate people. Service throughout the flight was flawless. They came through offering water, and picking up garbage at perfect intervals. Seemed like this flight, everyone was on point. And the flight landed early on top of that

Dear Aer Lingus Customer Care, I am writing to formally raise a complaint regarding my recent experience on Aer Lingus flight EI53 from Dublin to Seattle on 22/08/2025. Both my wife and I were seated in 15D, 15E directly under a faulty air conditioning unit. Even though the unit was switched off, cold air continued seeping through the sides and blew directly onto us for the entire duration of the flight (over 9 hours). We reported the issue to the cabin crew, but the only attempted solution was placing a piece of food-packaging sticker over the vent. Unsurprisingly, this had no effect. When we pressed further, the crew told us: “It is hard to fix it because we don’t have an engineer on board.” As a result, my wife and I remained exposed to constant cold airflow for the whole flight, and both of us became unwell afterwards, experiencing chills, sore throat and fever at the end of the flight. This has caused significant distress, disrupted our work plans. This experience highlights both a serious maintenance issue and a lack of adequate care for passengers. We therefore request: A full investigation into the defective AC system on this aircraft. An explanation of why no effective remedy (such as reseating us) was provided. Compensation for the illness and disruption caused to both myself and my wife. We ask for a full written response within 28 days. Should this matter not be satisfactorily resolved, we are prepared to escalate the complaint to the Irish Aviation Authority and Commission for Aviation Regulation and other relevant authorities. Thank you for your urgent attention to this matter. Sincerely, Temuujin Tuvshingal Myagmarsuren Ganbold

Nicest staff I’ve experienced on a plane! Good food, great entertainment, and they gave out little blankets that my kids loved. All in all, great experience.

Crew was fantastic got lovely food and plenty of water. Entertainment was good. Never had to ask for anything. Left on time and got to Seattle early. Luggage did not take long either.

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Centralia
Fife
Lakewood
Westport
Lacey
Mukilteo
Woodinville
Poulsbo
Edmonds
Aberdeen
DuPont
Shoreline
Monroe
Castle Rock
Edgewood

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