$381 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 8/26. 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
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

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

Mon, Jun 1 - Sun, Jun 14
Aer Lingus Logo
3:25 pm - 5:10 pm
DUB
-
SEA
9h 45mnonstop
Aer Lingus Logo
7:10 pm - 12:15 pm
SEA
-
DUB
9h 05mnonstop
$595Aer Lingus
Thu, Jun 4 - Mon, Jun 8
British Airways Logo
8:20 pm - 11:35 am
DUB
-
SEA
23h 15m
1 stop
British Airways Logo
1:30 pm - 6:40 pm
SEA
-
DUB
21h 10m
1 stop
$596British Airways
Thu, Jun 4 - Mon, Jun 8
British Airways Logo
8:20 pm - 11:35 am
DUB
-
SEA
23h 15m
1 stop
British Airways Logo
8:20 pm - 9:40 am
SEA
-
DUB
29h 20m
1 stop
$597British Airways
Fri, Jun 19 - Tue, Jun 23
Finnair Logo
9:30 am - 12:41 am
DUB
-
SEA
23h 11m
1 stop
Finnair Logo
5:40 pm - 5:15 pm
SEA
-
DUB
15h 35m
1 stop
$612Finnair
Sat, Sep 26 - Sun, Oct 4
Scandinavian Airlines Logo
8:00 pm - 1:45 pm
DUB
-
SEA
25h 45m
2 stops
Scandinavian Airlines Logo
3:55 pm - 6:20 pm
SEA
-
DUB
18h 25m
1 stop
$613Scandinavian Airlines
Wed, Sep 16 - Wed, Oct 7
JetBlue Logo
11:30 am - 8:42 pm
DUB
-
SEA
17h 12m
1 stop
JetBlue Logo
11:55 pm - 8:20 am
SEA
-
DUB
24h 25m
1 stop
$615JetBlue
Mon, Jun 1 - Sun, Jun 14
American Airlines Logo
12:40 pm - 10:49 am
DUB
-
SEA
30h 09m
1 stop
American Airlines Logo
1:58 pm - 11:50 am
SEA
-
DUB
13h 52m
1 stop
$616American Airlines
Fri, Jun 5 - Wed, Jun 17
Delta Logo
8:55 am - 4:24 pm
DUB
-
SEA
15h 29m
1 stop
Delta Logo
5:30 am - 10:00 am
SEA
-
DUB
20h 30m
1 stop
$619Delta
Wed, Jun 10 - Wed, Jun 24
Delta Logo
5:55 am - 11:37 am
DUB
-
SEA
13h 42m
1 stop
Delta Logo
9:05 am - 12:40 pm
SEA
-
DUB
19h 35m
2 stops
$620Delta
Fri, Jun 19 - Tue, Jun 23
Delta Logo
5:55 am - 7:05 pm
DUB
-
SEA
21h 10m
2 stops
Delta Logo
6:50 pm - 6:25 pm
SEA
-
DUB
15h 35m
1 stop
$621Delta
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 flight to Seattle?

These are the best round-trip prices found by users searching on KAYAK in the last 3 days.

In the last 3 days, the cheapest flight deal to Seattle was found on the route from Dublin, at $595 return. The most popular connection is from Los Angeles to Seattle and KAYAK users have found round-trip deals for as low as $135 in the last 3 days.

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 Saturday where round-trip tickets can be as cheap as $614. 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 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 $604 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 $1,027 and $897 respectively. For one-way flights, the best month to travel is April with an average price of $604.

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 $676 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 $676.

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 $615 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 4 weeks before departure, which saves you about 28% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$381
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Dublin to Seattle

FAQs - booking Seattle flights

  • What is the cheapest flight to Seattle?

    In the last 3 days, the cheapest flight deal to Seattle was found on the route from Dublin, at $595 return. The most popular connection is from Los Angeles to Seattle and KAYAK users have found round-trip deals for as low as $135 in the last 3 days.

  • 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 $673. The cheapest price found on KAYAK in the last 2 weeks cost $595 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 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.

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 $1,226
  • 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.
7.3
Aer LingusOverall score based on 1576 reviews
7.4Boarding
8.1Crew
7.0Entertainment
7.2Comfort
6.7Food
Airline reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

10.0 ExcellentAnthon, Apr 2026
DUB - BOS
Read more Aer Lingus reviews

I sat in the first row behind first class. There was plenty of legroom. The entertainment was great. I saw two excellent movies and one episode of a sitcom. Also enjoyed the flight tracker.

OK overall. Flight was delayed Crew on flight was good

On time, only a little turbulence, very competent and caring attendants. Clear information.

Late late late. Delayed and arrived an hour late for a 1 hour 45 minute connection. Every time. Poor record for this company. I try to fly any other carrier first.

The flights are literally always delayed arriving, boarding and taking off so they are always late for the connection. I planned ahead so I was okay but many others aren't. The food was terrible. The staff was very pleasant. I appreciate boarding back to front.

The crew was friendly. The plane was comfortable. In-flight wifi didn't work well at all. The ride was quite turbulent but understandable given the weather.

My issue is with the SkyWest terminal. The flight was not listed on the main airport flight screen list, and I had to do a Google search to locate the terminal and gate. We had to ask several airport employees where to locate the phantom gate. The airport did not provide adequate signage and was confusing. When we arrived, there was one vendor providing services that quickly closed, leaving zero options for food and drink while we waited hours for our delayed flight. The crew that assisted with check-in and boarding was VERY friendly.

Economy seats a bit small but other than that it was all good.

No complimentary drinks or snacks offered on a 2 hour flight was disappointing but everything else went well

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.

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
Woodinville
Poulsbo
Aberdeen
Edmonds
DuPont
Shoreline
Monroe
Castle Rock
Edgewood

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle