$347 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 5/28. 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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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, May 5 - Sat, May 30
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
$505Icelandair
Tue, Apr 21 - Sun, Apr 26
Icelandair Logo
2:15 pm - 8:40 pm
DUB
-
SEA
14h 25m
1 stop
Icelandair Logo
3:40 pm - 1:15 pm
SEA
-
DUB
13h 35m
1 stop
$511Icelandair
Sat, Sep 5 - Tue, Sep 15
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
$520Icelandair
Fri, May 22 - Fri, May 29
Multiple Airlines Logo
10:50 am - 4:30 pm
ORK
-
SEA
13h 40m
1 stop
Multiple Airlines Logo
6:40 pm - 2:25 pm
SEA
-
ORK
35h 45m
1 stop
$618Multiple Airlines
Thu, Apr 23 - Thu, Apr 30
KLM Logo
10:50 am - 11:45 am
ORK
-
SEA
32h 55m
1 stop
KLM Logo
1:30 pm - 2:40 pm
SEA
-
ORK
17h 10m
1 stop
$623KLM
Fri, May 22 - Fri, May 29
Delta Logo
6:15 am - 7:05 pm
ORK
-
SEA
20h 50m
2 stops
Delta Logo
1:45 pm - 4:35 pm
SEA
-
ORK
18h 50m
1 stop
$626Delta
Thu, Apr 23 - Thu, Apr 30
Multiple Airlines Logo
6:15 am - 2:42 pm
ORK
-
SEA
16h 27m
2 stops
Multiple Airlines Logo
1:30 pm - 2:40 pm
SEA
-
ORK
17h 10m
1 stop
$629Multiple Airlines
Fri, May 22 - Fri, May 29
Delta Logo
6:15 am - 7:05 pm
ORK
-
SEA
20h 50m
2 stops
Delta Logo
10:35 am - 10:20 am
SEA
-
ORK
15h 45m
2 stops
$790Delta
Mon, Apr 27 - Mon, May 4
Aer Lingus Logo
9:15 pm - 5:10 pm
SNN
-
SEA
51h 55m
2 stops
Aer Lingus Logo
7:10 am - 8:35 pm
SEA
-
SNN
29h 25m
2 stops
$909Aer Lingus
Mon, Apr 27 - Mon, May 4
Aer Lingus Logo
9:15 pm - 5:10 pm
SNN
-
SEA
51h 55m
2 stops
Aer Lingus Logo
1:30 pm - 8:35 pm
SEA
-
SNN
23h 05m
1 stop
$916Aer Lingus
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 72 hours.

In the last 3 days, the cheapest flight deal to Seattle was found on the route from Dublin, at $505 return. The most popular connection is from Los Angeles to Seattle and KAYAK users have found round-trip deals for as low as $95 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 Friday where round-trip tickets can be as cheap as $650. 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 February, where tickets cost $619 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 $1,040 and $897 respectively. For one-way flights, the best month to travel is February with an average price of $619.

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 $708 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 $708.

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 $602 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 10 weeks before departure.

Find deals

Good to know

Low seasonJanuary
Cheapest flight$347
Best time to beat the crowds with an average 2% drop in price.
Most popular time to fly and prices are also 11% 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 $505 return. The most popular connection is from Los Angeles to Seattle and KAYAK users have found round-trip deals for as low as $95 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 $640. The cheapest price found on KAYAK in the last 2 weeks cost $590 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 $614
  • 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 1500 reviews
7.2Comfort
7.0Entertainment
6.6Food
8.1Crew
7.4Boarding
Airline reviews

Checked in ok for 3 flights at the airport check-in desk, but apparently I was not checked in to my connecting flights even though I was assured that I was and had seats on all 3 flights. Aer Lingus departure was also delayed for 1.5 hours which gave no time to collect bags to go through customs.

4.0 OkayWendy, Apr 2026
DUB - YYZ
Read more Aer Lingus reviews

Checked in ok for 3 flights at the airport check-in desk, but apparently I was not checked in to my connecting flights even though I was assured that I was and had seats on all 3 flights. Aer Lingus departure was also delayed for 1.5 hours which gave no time to collect bags to go through customs.

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.

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.

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
Aberdeen
Woodinville
Poulsbo
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

Seattle (SEA)