$335 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 4/18. 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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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

Fri, Apr 17 - Fri, Apr 24
Multiple Airlines Logo
9:30 am - 7:36 pm
DUB
-
SEA
18h 06m
1 stop
Multiple Airlines Logo
1:35 pm - 7:25 pm
SEA
-
DUB
21h 50m
1 stop
$407Multiple Airlines
Thu, Apr 9 - Thu, Apr 16
Finnair Logo
9:30 am - 7:36 pm
DUB
-
SEA
18h 06m
1 stop
Finnair Logo
7:09 am - 9:45 am
SEA
-
DUB
18h 36m
1 stop
$420Finnair
Fri, May 22 - Sun, May 31
Scandinavian Airlines Logo
12:40 pm - 1:45 pm
DUB
-
SEA
33h 05m
1 stop
Scandinavian Airlines Logo
3:55 pm - 6:20 pm
SEA
-
DUB
18h 25m
1 stop
$458Scandinavian Airlines
Fri, May 22 - Sun, May 31
Scandinavian Airlines Logo
7:50 pm - 1:45 pm
DUB
-
SEA
25h 55m
2 stops
Scandinavian Airlines Logo
3:55 pm - 6:20 pm
SEA
-
DUB
18h 25m
1 stop
$462Scandinavian Airlines
Fri, May 22 - Sun, May 31
Scandinavian Airlines Logo
7:05 pm - 1:45 pm
DUB
-
SEA
26h 40m
1 stop
Scandinavian Airlines Logo
3:55 pm - 6:20 pm
SEA
-
DUB
18h 25m
1 stop
$472Scandinavian Airlines
Mon, Mar 9 - Wed, Mar 25
Icelandair Logo
11:30 am - 6:00 pm
DUB
-
SEA
13h 30m
1 stop
Icelandair Logo
3:35 pm - 10:15 am
SEA
-
DUB
11h 40m
1 stop
$476Icelandair
Tue, Apr 7 - Tue, Apr 14
Icelandair Logo
2:15 pm - 5:55 pm
DUB
-
SEA
11h 40m
1 stop
Icelandair Logo
3:40 pm - 11:05 am
SEA
-
DUB
11h 25m
1 stop
$500Icelandair
Thu, Apr 9 - Thu, Apr 16
KLM Logo
6:15 am - 4:30 pm
ORK
-
SEA
18h 15m
1 stop
KLM Logo
5:30 pm - 10:20 am
SEA
-
ORK
32h 50m
1 stop
$544KLM
Thu, Apr 9 - Thu, Apr 16
Delta Logo
10:50 am - 10:15 pm
ORK
-
SEA
19h 25m
2 stops
Delta Logo
8:50 am - 10:20 am
SEA
-
ORK
17h 30m
2 stops
$549Delta
Thu, Mar 5 - Mon, Mar 9
Delta Logo
11:15 am - 10:05 pm
ORK
-
SEA
18h 50m
2 stops
Delta Logo
7:25 am - 10:45 am
SEA
-
ORK
20h 20m
2 stops
$552Delta
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 November, where tickets cost $640 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 $961 and $897 respectively. For return trips, the best month to travel is November with an average price of $640.

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 $585 one-way - $555 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 42 days before departure.

Good to know

Low seasonJanuary
Cheapest flight$335
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly with an average 22% 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 $676. The cheapest price found on KAYAK in the last 2 weeks cost $549 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 $672. On the other hand, the most expensive day to fly is Thursday, where prices are $900 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 $715 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 $715.

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 $936
  • 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 1462 reviews
8.1Crew
7.1Comfort
7.0Entertainment
7.4Boarding
6.6Food
Airline reviews

All aspects were excellent - it helped that the flight was only 2/3 full and I had no one sitting in my row. The Pre-check (US Passport Control and Customs) in Dublin made everything so easy when we arrived in Chicago.

10.0 ExcellentJohanna, Feb 2026
DUB - ORD
Read more Aer Lingus reviews

All aspects were excellent - it helped that the flight was only 2/3 full and I had no one sitting in my row. The Pre-check (US Passport Control and Customs) in Dublin made everything so easy when we arrived in Chicago.

I love the direct flights. It saves a lot of hassle and allows immigration and customs in Ireland, making arrival much easier.

Great. Has a problem with DOB. Fixed 4 us. Led to a 5 hour earlier flight to London!

One of the best flight experiences I've have had in along time. Would fly with them again.

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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Lynnwood
Centralia
Fife
Lakewood
Mukilteo
Westport
Lacey
Edmonds
Aberdeen
Poulsbo
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