
Cheap Flights from Ireland to Seattle
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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?
The average price of all round-trip flights to Seattle clicked on KAYAK for each day over the last 12 months.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?
To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.The cheapest month for flights to Seattle is April, where tickets cost $584 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 average price for all round-trip flights to Seattle depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.The cheapest time of day to fly to Seattle is generally in the evening, when round-trip flights cost $726 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 $726.
How far in advance should I book a flight to Seattle?
To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.To get a below average price, you should book around 2 weeks before departure, which saves you about 30% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 10 weeks before departure.
How long is the flight to Seattle?
The duration of your flight to Seattle depends on your departure and arrival airports. Obviously, any flights that include a layover will also be longer. The most popular routes to Seattle on KAYAK are from Dublin, which takes 9h 45m, Shannon, which takes 17h 00m, and Cork, which takes 32h 45m.
How many direct flights to Seattle are there each day?
There are around 2,184 direct flights from within Ireland to Seattle every day. Most flights depart in the morning, with 48% of flights departing in the morning.
How many direct flights to Seattle are there each week?
Each week there are around 15,288 direct flights from within Ireland to Seattle. The most common day for departures is Sunday, with 17% of flights taking off on this day.
How many long-haul flights are there to Seattle each week?
There are not any medium-haul (3-6 hour flight duration) or short-haul (up to 3 hour flight duration) flights to Seattle. Instead, there are 28 long-haul flights (6-12 hour flight duration), with the most arriving from Dublin.
Good to know
Low season | January |
|---|---|
High season | May |
Cheapest flight | $409 |
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Reviews of the top airline flying from Ireland to Seattle
Didn’t have requested food and seats could be more comfortable.
Didn’t have requested food and seats could be more comfortable.
Flight attendants on this flight were very lovely. Hot food was terrible. Canned wine felt elevated and was GOOD. The aircraft was overall not very clean. Although this one was much more cleanly than the flight from Pisa. Pilots were great & landings felt smooth and safe. As I mentioned in my last review, this was my first time flying aer Lingus in many years and I cannot say I will be rushing to book again. This airline needs a real facelift.
Everything went extremely smoothly! They boarded by groupings of seat numbers starting from back to front. All staff very helpful and accommodating. Food and beverage plentiful and good.
The plane from Venice to Dublin ran out of food. They did not restock the plane in Venice.
It was very refreshing being in a nice and clean plain, with pillows and earphones that you don’t have to pay for, with warm food and beverages and a very nice crew
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.