$298 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 4/28. 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
$434
Overall average: $613
Icelandair
Thu 2/5Mon 2/16
DUB - SEA • 1 stop
Cheapest non-stop
$496
Typical prices: $629-$802
Aer Lingus
Mon 2/23Sun 3/8
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

Thu, Feb 5 - Mon, Feb 16
Icelandair Logo
11:30 am - 5:00 pm
DUB
-
SEA
13h 30m
1 stop
Icelandair Logo
2:35 pm - 10:15 am
SEA
-
DUB
11h 40m
1 stop
$434Icelandair
Thu, Feb 26 - Thu, Mar 5
Icelandair Logo
11:30 am - 5:00 pm
DUB
-
SEA
13h 30m
1 stop
Icelandair Logo
2:35 pm - 10:15 am
SEA
-
DUB
11h 40m
1 stop
$435Icelandair
Thu, Apr 9 - Thu, Apr 16
Icelandair Logo
2:15 pm - 8:40 pm
DUB
-
SEA
14h 25m
1 stop
Icelandair Logo
3:40 pm - 11:05 am
SEA
-
DUB
11h 25m
1 stop
$438Icelandair
Wed, Jun 10 - Tue, Jun 30
Finnair Logo
9:30 am - 11:39 pm
DUB
-
SEA
22h 09m
1 stop
Finnair Logo
1:18 pm - 11:50 am
SEA
-
DUB
14h 32m
1 stop
$455Finnair
Mon, Feb 23 - Mon, Mar 9
British Airways Logo
5:55 pm - 4:55 pm
DUB
-
SEA
31h 00m
1 stop
British Airways Logo
7:50 pm - 7:40 pm
SEA
-
DUB
16h 50m
1 stop
$486British Airways
Mon, Feb 23 - Mon, Mar 9
British Airways Logo
4:00 pm - 11:30 am
DUB
-
SEA
27h 30m
1 stop
British Airways Logo
7:50 pm - 7:40 pm
SEA
-
DUB
16h 50m
1 stop
$487British Airways
Thu, Feb 5 - Mon, Feb 16
Multiple Airlines Logo
11:30 am - 10:07 pm
DUB
-
SEA
18h 37m
1 stop
Multiple Airlines Logo
7:15 am - 8:40 am
SEA
-
DUB
17h 25m
2 stops
$494Multiple Airlines
Thu, Apr 9 - Thu, Apr 16
Delta Logo
10:50 am - 4:30 pm
ORK
-
SEA
13h 40m
1 stop
Delta Logo
9:00 am - 10:20 am
SEA
-
ORK
17h 20m
2 stops
$564Delta
Sat, May 23 - Mon, Jun 1
Delta Logo
6:00 am - 6:52 pm
ORK
-
SEA
20h 52m
2 stops
Delta Logo
1:30 pm - 2:40 pm
SEA
-
ORK
17h 10m
1 stop
$566Delta
Mon, Jan 26 - Mon, Feb 2
Multiple Airlines Logo
7:50 am - 8:56 pm
SNN
-
SEA
21h 06m
2 stops
Multiple Airlines Logo
6:50 pm - 4:45 pm
SEA
-
SNN
13h 55m
1 stop
$911Multiple Airlines
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 $613 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 $990 and $897 respectively. For return trips, the best month to travel is February with an average price of $613.

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$298
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 24% 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 $660. The cheapest price found on KAYAK in the last 2 weeks cost $582 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 $613. 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 evening, which is peak travel time and where the average cost of a ticket is $739.

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

    Each week there are around 3,023 direct flights from within Ireland to Seattle. The most common day for departures is Monday, with 15% of flights taking off on this day.

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 $1,177
  • 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 1435 reviews
7.1Comfort
7.4Boarding
8.0Crew
6.9Entertainment
6.6Food
Airline reviews

So, the trip from Dublin to LA did not really happen because the flight took off before we could finish the transfer.

4.0 OkaySheng, Jan 2026
DUB - LAX
Read more Aer Lingus reviews

So, the trip from Dublin to LA did not really happen because the flight took off before we could finish the transfer.

Very nice experience. Flight had good entertainment system and good food options. Customer service was very friendly and nice as well.

Like - the crew were nice Dislike - sitting on the tarmac for long periods after boarding and landing.

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!

Traveling to a place near Seattle?

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

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle