£327 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 return flight deals from Ireland to Seattle

Thu, 12 Nov - Thu, 26 Nov
Icelandair Logo
11:30 - 17:00DUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 10:15SEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
£450Icelandair
Thu, 12 Nov - Thu, 26 Nov
Icelandair Logo
11:30 - 17:00DUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 10:15SEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
£454Icelandair
Fri, 12 Feb - Wed, 17 Feb
Icelandair Logo
11:30 - 17:00DUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 10:15SEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
£455Icelandair
Fri, 12 Feb - Wed, 17 Feb
Scandinavian Airlines Logo
19:05 - 20:50DUB  Dublin-SEA Seattle/Tacoma Intl
33h 45m2 stops Kastrup Copenhagen San Francisco
Scandinavian Airlines Logo
11:45 - 18:20SEA  Seattle/Tacoma Intl-DUB Dublin
22h 35m2 stops San Francisco Kastrup Copenhagen
£457Scandinavian Airlines
Fri, 12 Feb - Thu, 18 Feb
Icelandair Logo
11:30 - 17:00DUB  Dublin-SEA Seattle/Tacoma Intl
13h 30m1 stop Reykjavik Keflavik Intl
Icelandair Logo
14:35 - 10:15SEA  Seattle/Tacoma Intl-DUB Dublin
11h 40m1 stop Reykjavik Keflavik Intl
£462Icelandair
Sun, 13 Dec - Mon, 28 Dec
Scandinavian Airlines Logo
10:10 - 22:02DUB  Dublin-SEA Seattle/Tacoma Intl
19h 52m2 stops Kastrup Copenhagen Los Angeles
Scandinavian Airlines Logo
07:15 - 18:20SEA  Seattle/Tacoma Intl-DUB Dublin
27h 05m2 stops Chicago O'Hare Intl Kastrup Copenhagen
£471Scandinavian Airlines
Thu, 1 Apr - Wed, 7 Apr
Scandinavian Airlines Logo
19:05 - 22:04DUB  Dublin-SEA Seattle/Tacoma Intl
34h 59m2 stops Kastrup Copenhagen Boston Logan Intl
Scandinavian Airlines Logo
14:30 - 18:20SEA  Seattle/Tacoma Intl-DUB Dublin
19h 50m2 stops Los Angeles Kastrup Copenhagen
£477Scandinavian Airlines
Sat, 12 Dec - Sat, 19 Dec
Aer Lingus Logo
11:30 - 00:47DUB  Dublin-SEA Seattle/Tacoma Intl
21h 17m1 stop Chicago O'Hare Intl
Aer Lingus Logo
23:59 - 09:30SEA  Seattle/Tacoma Intl-DUB Dublin
25h 31m1 stop Chicago O'Hare Intl
£701Aer Lingus
Sat, 19 Dec - Fri, 8 Jan
Aer Lingus Logo
15:50 - 23:42DUB  Dublin-SEA Seattle/Tacoma Intl
15h 52m1 stop Chicago O'Hare Intl
Aer Lingus Logo
10:17 - 10:25SEA  Seattle/Tacoma Intl-DUB Dublin
16h 08m1 stop Chicago O'Hare Intl
£798Aer Lingus
Thu, 1 Apr - Thu, 29 Apr
Aer Lingus Logo
16:45 - 23:52DUB  Dublin-SEA Seattle/Tacoma Intl
15h 07m1 stop Chicago O'Hare Intl
Aer Lingus Logo
19:10 - 12:15SEA  Seattle/Tacoma Intl-DUB Dublin
9h 05mdirect
£2,433Aer Lingus
Booking Insights

KAYAK's insights & trends for flights to Seattle

Get data-powered insights and trends into 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 Wednesday where round-trip tickets can be as cheap as £553. On the other hand, the most expensive day to fly is Tuesday, where round-trip prices are £953 on average.

What is the cheapest month to fly to Seattle?

The cheapest month for flights to Seattle is April, where tickets cost £452 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 £780 and £759 respectively. For one-way flights, the best month to travel is November with an average price of £402.

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 £615 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 £615.

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 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.

Good to know - Cheap tickets from Ireland to Seattle

Low season

January

Cheapest flight

£327
Best time to beat the crowds (5% less expensive on average)
Most popular time to fly and prices are also 19% lower on average.
Flight from Dublin to Seattle

FAQs - booking Seattle flights

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

    The city centre of Seattle is 11 miles from Seattle.

  • What is the name of Seattle’s airport?

    When flying to Seattle, you'll arrive at Seattle/Tacoma Intl Airport (SEA). The airport is also known as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • How much is a flight to Seattle?

    On average, a flight to Seattle costs £575. The cheapest price found on KAYAK in the last 2 weeks cost £547 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 travellers 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.

  • How many direct flights to Seattle are there each week?

    Each week there are around 176 direct flights from within Ireland to Seattle. The most common day for departures is Thursday, with 16% of flights taking off on this day.

Top tips for finding cheap flights to Seattle

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Reviews of the top airlines 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 1868 reviews
8.1Crew
6.7Food
7.2Comfort
7.5Boarding
7.1Entertainment
Airline reviews

The staff on the flight were utterly brilliant; there was a young man who was particularly exceptional. Boarding was quick and seamless, and service was great! Seats were fab, as was the entertainment and its ease of access

10.0 ExcellentJessica, Oct 2026
Read more Aer Lingus reviews

The staff on the flight were utterly brilliant; there was a young man who was particularly exceptional. Boarding was quick and seamless, and service was great! Seats were fab, as was the entertainment and its ease of access

i’m The staff on my flight were amazing as always, beautiful professional staff, they do amazing job. the food ? room for improvement

The agents at the boarding desk were not very helpful, however the hostesses on board the flight were great, the food was ok, and there were lots for choices for entertainment. I was stuck in an middle row seat which was a pain on a full flight, but otherwise the flight was great.

The man in front of me reclined the entire flight, including during meals, which was aggravating. My screen had issues with brightness and kept flickering in and out.

Everything was smooth and the meal was delicious. I really appreciated that Aer Lingus still offers complimentary beverages, food, luggage and headphones. It was nice that the main meal also featured some items typical to Ireland including the wheaten bread and Kerrygold butter. I generally found the flight a quite relaxing and enjoyable experience.

I was advertised a free seat selection for a "Smart" fare through BusinessClass.com. I was never able to select a seat. I thus paid extra for a bill of goods I was never provided. would love to speak with a representative of Kayak

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.

Flight was ok but the food was poor, and the business chairs were not comfortable.

Great experience in Saga Premium. Food was tasty and felt fresh. Seat was comfortable (enough) - would have wanted a layflat seat.

The ticket was reserved in my name but not paid for by underpricer. Alaska airlines was unable to issue my ticket (could not connect the ticket with the PNR) due to an error with underpricer and I spent the better part of 2 hours at the ticket counter trying to rectify.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

One of the worst airlines I ever flew. Boarding is a disaster, they are always late, the planes are overly crowded. Everyone on my flight lost their connection because they were 2h late. Reykjavik is also not the best airport out there.

Flight was delayed. They did a terrible job rebooking me. Agent on the ground was useless. The partner airline who ran the plane was able to help me but Iceland air was useless

Flight delayed Delay to the gate upon arrival Baggage took more than an hour so we missed our connecting!!! Terrible experience!

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