$315 Find Cheap Flights from Ireland to Seattle

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 4/26. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to Seattle, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$521
Typical prices: $512-$758
Multiple Airlines
Tue 2/3Tue 2/10
DUB - SEA • 2 stops
Cheapest non-stop
$782
Typical prices: $756-$900
Aer Lingus
Mon 6/1Sat 6/13
DUB - SEA • Non-stop
When to travel
February
Cheapest • 15% price drop
August
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ireland to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ireland to Seattle that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ireland to Seattle

Tue, Feb 3 - Tue, Feb 10
Multiple Airlines Logo
6:55 am - 5:00 pm
DUB
-
SEA
18h 05m2 stops
Multiple Airlines Logo
2:35 pm - 9:50 pm
SEA
-
DUB
23h 15m2 stops
$521Multiple Airlines
Tue, Feb 3 - Tue, Feb 10
Multiple Airlines Logo
6:55 am - 5:00 pm
DUB
-
SEA
18h 05m2 stops
Multiple Airlines Logo
2:35 pm - 7:05 pm
SEA
-
DUB
20h 30m2 stops
$522Multiple Airlines
Mon, Feb 2 - Mon, Feb 9
Multiple Airlines Logo
7:00 am - 5:00 pm
DUB
-
SEA
18h 00m2 stops
Multiple Airlines Logo
2:35 pm - 2:50 pm
SEA
-
DUB
16h 15m2 stops
$524Multiple Airlines
Mon, Jun 1 - Sat, Jun 13
Scandinavian Airlines Logo
7:50 pm - 1:45 pm
DUB
-
SEA
25h 55m2 stops
Scandinavian Airlines Logo
3:55 pm - 6:20 pm
SEA
-
DUB
18h 25m1 stop
$525Scandinavian Airlines
Mon, Jun 1 - Sat, Jun 13
Scandinavian Airlines Logo
7:05 pm - 1:45 pm
DUB
-
SEA
26h 40m1 stop
Scandinavian Airlines Logo
3:55 pm - 6:20 pm
SEA
-
DUB
18h 25m1 stop
$531Scandinavian Airlines
Mon, Jun 1 - Sat, Jun 13
Scandinavian Airlines Logo
7:50 pm - 1:45 pm
DUB
-
SEA
25h 55m2 stops
Scandinavian Airlines Logo
3:55 pm - 6:25 pm
SEA
-
DUB
18h 30m2 stops
$532Scandinavian Airlines
Wed, Mar 4 - Fri, Mar 13
Aer Lingus Logo
8:45 am - 4:55 pm
DUB
-
SEA
16h 10m1 stop
Aer Lingus Logo
9:05 pm - 1:10 pm
SEA
-
DUB
9h 05mnonstop
$628Aer Lingus
Thu, Apr 9 - Thu, Apr 16
Delta Logo
6:00 am - 11:45 am
ORK
-
SEA
13h 45m1 stop
Delta Logo
1:30 pm - 2:40 pm
SEA
-
ORK
17h 10m1 stop
$772Delta
Thu, Apr 9 - Thu, Apr 16
KLM Logo
10:50 am - 4:30 pm
ORK
-
SEA
13h 40m1 stop
KLM Logo
1:30 pm - 2:40 pm
SEA
-
ORK
17h 10m1 stop
$773KLM
Thu, Apr 9 - Thu, Apr 16
Delta Logo
6:00 am - 11:45 am
ORK
-
SEA
13h 45m1 stop
Delta Logo
6:00 am - 10:20 am
SEA
-
ORK
20h 20m2 stops
$777Delta
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 month to fly to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for 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 February, where tickets cost $605 on average for one-way flights. On the other hand, the most expensive months are July and August, where the average cost of tickets from Ireland is $937 and $897 respectively. For return trips, the best month to travel is February with an average price of $605.

What is a good deal for flights to Seattle?

If you’re looking for cheap airfare to Seattle, 25% of our users found tickets to Seattle for the following prices or less: From Dublin $619 one-way - $698 round-trip.

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 1 week before departure. For the absolute cheapest price, our data suggests you should book 66 days before departure.

Good to know

Low seasonJanuary
Cheapest flight$315
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly with an average 25% increase in price.
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 $740. The cheapest price found on KAYAK in the last 2 weeks cost $546 and departed from Dublin Airport.

  • What is the cheapest day to fly to Seattle?

    Based on KAYAK data, the cheapest day to fly to Seattle is Sunday where tickets can be as cheap as $695. On the other hand, the most expensive day to fly is Thursday, where prices are $997 on average.

  • 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.

  • 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 flights cost $739 on average. The most expensive time of day to fly to Seattle is generally in the morning, which is peak travel time and where the average cost of a ticket is $750.

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 $1,012
  • 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

 
See real verified KAYAK customer reviews for airlines flying to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Ireland to Seattle. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
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.
7.2
Aer LingusOverall score based on 1406 reviews
7.4Boarding
6.9Entertainment
8.0Crew
6.6Food
7.1Comfort
Airline reviews

I was not admitted to the flight!!! i need a refund for this.

2.0 MediocreSvetlana, Dec 2025
DUB - IAD
Read more Aer Lingus reviews

I was not admitted to the flight!!! i need a refund for this.

It’s my new favourite airline! Everything was smooth and relaxed!

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

Seats are small, but comfortable and more space around you, so for a normal person the seats are perfect. If you are a big and fat individual, I would not think the seats are comfortable. All else was good and normal. Lots of movies to watch.

Customer service was excellent! The app was terrible, tried several times to check in without success! But the young lady that checked us in was absolutely terrific and helpful.

The same as I stated prior. We incurred extra costs that should be reimbursed, given we were not communicated with about schedule changes.

Experience was great overall. However, the connection time between my flights (1hr 15 mins) was too short. We had to get through security check and US immigration in that time, and I made it to the gate just as they were announcing it was about to close. Flights with such a short connection time should maybe not be offered for purchase, or an advance alert would be helpful. Other than that the in-flight experience was excellent, especially the food. Many thanks!

The seats needs to be comfortables, at least please add more padding to the seats.

Incredible service. Incredible entertainment. I felt like they just kept serving us something new avery hour. My wife and I both had a joyous flight.

They out me in the baby row so I was surrounded by toddlers, they also did not send my luggage and was not able to book my connecting flight

Traveling to a place near Seattle?

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

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle