£323 Find Cheap Flights from Ireland to Seattle

This is the cheapest return flight price found by a KAYAK user in the last 72 hours by searching for a flight to Seattle departing on 18/9. 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

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
Travellers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 27% 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.

Flights Deals
Useful Info
Flights Deals

Cheap Flights from Ireland to Seattle

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for return 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 return flight deals from Ireland to Seattle

Thu, 18 Sep - Fri, 10 Oct
Scandinavian Airlines Logo
19:05 - 14:00DUB-SEA
26h 55m1 stop
Scandinavian Airlines Logo
16:20 - 09:25SEA-DUB
33h 05m1 stop
£323Scandinavian Airlines
Find Deal
Thu, 18 Sep - Wed, 8 Oct
Scandinavian Airlines Logo
19:05 - 14:00DUB-SEA
26h 55m1 stop
Scandinavian Airlines Logo
16:20 - 18:15SEA-DUB
17h 55m1 stop
£336Scandinavian Airlines
Find Deal
Sun, 14 Sep - Fri, 10 Oct
Icelandair Logo
12:15 - 20:40DUB-SEA
16h 25m1 stop
Icelandair Logo
15:45 - 13:15SEA-DUB
13h 30m1 stop
£460Icelandair
Find Deal
Tue, 9 Sep - Thu, 18 Sep
Icelandair Logo
14:15 - 11:25DUB-SEA
29h 10m1 stop
Icelandair Logo
15:45 - 11:05SEA-DUB
11h 20m1 stop
£489Icelandair
Find Deal
Fri, 7 Nov - Mon, 10 Nov
Delta Logo
05:55 - 16:24DUB-SEA
18h 29m2 stops
Delta Logo
14:00 - 15:40SEA-DUB
17h 40m1 stop
£495Delta
Find Deal
Fri, 7 Nov - Mon, 10 Nov
Delta Logo
05:55 - 14:45DUB-SEA
16h 50m2 stops
Delta Logo
14:00 - 15:40SEA-DUB
17h 40m1 stop
£496Delta
Find Deal
Sun, 14 Sep - Tue, 7 Oct
British Airways Logo
20:25 - 11:35DUB-SEA
23h 10m1 stop
British Airways Logo
15:13 - 17:55SEA-DUB
18h 42m2 stops
£523British Airways
Find Deal
Sun, 30 Nov - Sun, 15 Feb
Aer Lingus Logo
16:30 - 18:20DUB-SEA
9h 50mdirect
Aer Lingus Logo
18:50 - 19:05SEA-DUB
16h 15m1 stop
£567Aer Lingus
Find Deal
Tue, 16 Sep - Wed, 8 Oct
Aer Lingus Logo
11:05 - 22:10DUB-SEA
19h 05m1 stop
Aer Lingus Logo
19:35 - 12:35SEA-DUB
9h 00mdirect
£574Aer Lingus
Find Deal
Tue, 15 Jul - Mon, 4 Aug
British Airways Logo
10:25 - 00:43DUB-SEA
22h 18m2 stops
British Airways Logo
20:20 - 19:35SEA-DUB
15h 15m1 stop
£612British Airways
Find Deal
Useful Info

KAYAK's insights & trends for flights to Seattle

Get data-powered insights and trends into 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 £447 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 £764 and £656 respectively. For one-way flights, the best month to travel is February with an average price of £447.

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 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know - Cheap tickets from Ireland to Seattle

Low seasonNovember
High seasonAugust
Cheapest flight£286
Best time to beat the crowds (13% less expensive on average)
Most popular time to fly (20% more expensive on average)
Flight from Dublin to Seattle

FAQs - booking Seattle flights

  • How far is Seattle/Tacoma Intl Airport from central Seattle?

    The city centre of Seattle is 11 miles from Seattle.

  • What is the name of Seattle’s airport?

    When flying to Seattle, you'll arrive at Seattle/Tacoma Intl Airport (SEA). The airport is also known as Seattle-Tacoma Intl, Seattle/Tacoma, or Seattle/Tacoma Intl.

  • How much is a flight to Seattle?

    On average, a flight to Seattle costs £570. The cheapest price found on KAYAK in the last 2 weeks cost £479 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 Wednesday where round-trip tickets can be as cheap as £546. On the other hand, the most expensive day to fly is Saturday, where round-trip prices are £765 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 travellers 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 morning, when round-trip flights cost £718 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 £825.

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

    Each week there are around 28 direct flights from within Ireland to Seattle. The most common day for departures is Tuesday, with 14% 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: Cheap flights to Seattle from Dublin £515
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest Seattle flight deals.

Top 3 airlines serving 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.
7.1
Aer LingusOverall score based on 1117 reviews
7.2Boarding
7.0Comfort
6.8Entertainment
6.4Food
7.9Crew
Airline reviews

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

10.0 ExcellentAnonymous, Jun 2025MAN - MCO
Read more Aer Lingus reviews

I would definitely use a Linus again, the price was right, the service is excellent. No delays. Wish I had a direct flight from my hometown Detroit.

At check-in the unmanned machines said QR code was invalid so had to queue for over an hour to check in bags

i used to fly aer Lingus regularly but due to price - poor seating etc i have been using other carriers - i now have aer lingus in my state and the price is always the highest - i have flown to Ireland 11 times in last 24 months and have not used Hartford because of price

Nicest staff I’ve experienced on a plane! Good food, great entertainment, and they gave out little blankets that my kids loved. All in all, great experience.

Unfortunately the flight was delayed for 50 min. Just as we were about to board so that was a drag. The boarding was average. The bag check in process was new to us and efficient. And the flight itself was smooth- basically no turbulence.

It was ok not that much because I always travel with Emirates airlines, Etihad, airlines, Qatar airlines compare to them food and comfortable was too low . Staff was good . Helpful

Noted in last review. Good to know, though air Lingus on European flights does not offer any food or drink, even though we were on the plane for 3 1/2 hours from Naples to Dublin everything you had to purchase even water.

Boarding seemed a bit chaotic and we had to walk outside across the tarmac. Passengers of all ages had to drag carry on luggage up the outside stairway into the aircraft. There was no WiFi. Very uncomfortable crammed seats. Glad in-air time was only an hour!

Booked through Kayak, couldnt take flight, Kayak punted to Orbiz, Orbiz punted to Aer Lingus, Aer Lingus said sorry about your luck, try Kayak/Orbiz. Terrible customer service collecting air fares and not even offering a voucher when customers cant take flight

Gate agents kind of serious. Had to wait til arriving at gate to choose seats. Thankfully they did give us seats together! And grateful the honored our age, giving us seats at the front.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset.

Iceland airlines doesn't provide any meal on flight to and from New York, except water and soda. Airline over charge for checking in luggage. I'm really upset. If there is option to use another company, I suggest to other people use them.

The seats on this airline are sooo small, even for a petite person. I felt like the seat tilted forward and I was fighting to stay in it. The lavatory is horribly small, with a wet floor because the sink is so small you can't help but splash the water all over when washing up.

For an economy lite experience, it's by far the best I've had. New planes, clean, great destinations. Very happy to have discovered Iceland Air.

Smooth efficient airline. Think they should have their own bag drop as the queue took 30mins to bmscan and drop

Good. Lacking overhead bin space. No food offered but you can order online or in flight and pay for snacks.

No food was served for 7.5 hrs flight. When our flight changed to other airlines due to wether issue, our seats booked with no checked in luggage when I already payed for. We end up to pay 90 euro per suitcase.

The flights were in time and the bags arrived. well done

Only serving 2 small coffee in 7.5 hrs flight with very limited choice to order food.

Booked with Kayak… Economy Class it said. I had filtered for 1 checked bag. Get to boarding and it says I have Economy Light w/ no checked bags. $136 each way for baggage now. Do not use smartfares.com. Very misleading and a terrible start to this trip.

Better synchronizing the boarding processes. The audio announcements, the personnel and the digital signage were not saying the same thing. All confusion.

The first class seats were unusable, mine at the end of the flight, my husband's in the middle of the flight, and the one next to me was unusable either, they had to move the person to another seat.

Last minute gate change. Didn’t put our TSA global on our trip even though we asked multiple times to confirm. Did not help with food when could not eat what was served.

Our luggage didn’t arrive with us, that puts a damper on the whole trip.

The cabin was bit colder than I like but the crew members looked after us very well. They did even offer hot water bottle and hot chocolate. I cannot rate the crew enough excellent is not good enough. They really were wonderful.

Boarding is always a challenge as folks in al groups crowd around for no reason, but crew handled it well. I once again applaud the LHR ground baggage staff as they got our bags from a flight at Terminal 5A to a flight in Terminal 5C within 40 minutes...amazing!

This flight from London to Chicago was actually on an AA airline. I did book through BA but the flight was AA. Great flight, hectic in Chicago, I wouldn't choose to fly through Chicago again, but that's not the airlines fault. The flight itself was great.

Push back is not working when I complaint a male staff he told me that most of the seats are like that so we can’t do anything

Seats were way too small. I got claustrophobic waiting for trash from meal to be taken away. I couldn't move to even close my tray until trash was taken.

Was 3 hrs delayed and my poor friend I met in Barcelona was waiting at airport for 3 hrs. Dallas airport was awful

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Kent
Westport
Renton
Federal Way
Marysville
Gig Harbor
Lacey
Aberdeen
Bainbridge Island
Snoqualmie
Poulsbo
Edmonds
Ellensburg
Shelton
Monroe
Silverdale

Everything you need to know for your flight to Seattle

Information on the airport you'll fly into in Seattle

Not what you’re looking for? Find thousands of other hotels, flights, car hires and package deals with KAYAK.