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$368+ Cheap flights from Ireland to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/13. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
mai 31 — jun 71
dom 5/31
dom 6/7
1 adult, Economy
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Cheap flight deals from Ireland to Seattle

Cheapest flights from Ireland to Seattle
Explore the most affordable flight options available from Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on maio 1, 2026.

This lol.travel deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 5/109:30 am
DUB
-
SEA
1 stop21h 08m
Finnair
seg 5/2510:27 am
SEA
-
DUB
1 stop17h 23m
Finnair
Deal found 4/30$567
This lol.travel deal was found by Cheapflights users on 4/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/229:30 am
DUB
-
SEA
1 stop22h 46m
Finnair
ter 6/3010:27 am
SEA
-
DUB
1 stop17h 23m
Finnair
Deal found 4/30$568
This lol.travel deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom 5/39:30 am
DUB
-
SEA
1 stop18h 06m
Finnair
dom 5/171:19 pm
SEA
-
DUB
1 stop14h 31m
Finnair
Deal found 4/26$570
This lol.travel deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qua 6/249:30 am
DUB
-
SEA
1 stop23h 11m
Finnair
ter 6/3010:27 am
SEA
-
DUB
1 stop17h 23m
Finnair
Deal found 4/29$571
This lastminute.com deal was found by Cheapflights users on 4/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/223:25 pm
DUB
-
SEA
Nonstop9h 45m
Aer Lingus
qua 6/37:10 pm
SEA
-
DUB
Nonstop9h 10m
Aer Lingus
Deal found 4/27$586
This Expedia deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
seg 5/189:30 am
DUB
-
SEA
1 stop23h 06m
Finnair
qui 5/2810:27 am
SEA
-
DUB
1 stop17h 23m
Finnair
Deal found 4/29$591
This Finnair deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 6/199:40 am
DUB
-
SEA
1 stop14h 20m
Finnair
ter 6/307:31 am
SEA
-
DUB
1 stop18h 14m
Finnair
Deal found 5/1$594
This Finnair deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 6/259:30 am
DUB
-
SEA
1 stop23h 11m
Multiple Airlines
ter 6/301:30 pm
SEA
-
DUB
1 stop12h 10m
Multiple Airlines
Deal found 4/29$598
This British Airways deal was found by Cheapflights users on 5/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
qui 6/48:20 pm
DUB
-
SEA
1 stop23h 15m
British Airways
ter 6/308:20 pm
SEA
-
DUB
1 stop15h 10m
British Airways
Deal found 5/1$600
This British Airways deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb 5/236:45 pm
DUB
-
SEA
1 stop24h 50m
British Airways
sáb 6/68:20 pm
SEA
-
DUB
1 stop15h 10m
British Airways
Deal found 4/26$601
This British Airways deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
ter 5/268:25 pm
DUB
-
SEA
1 stop23h 10m
British Airways
seg 6/88:20 pm
SEA
-
DUB
1 stop31h 45m
British Airways
Deal found 4/28$602
This Gotogate deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sex 5/83:25 pm
DUB
-
SEA
Nonstop9h 45m
Aer Lingus
dom 5/247:10 pm
SEA
-
DUB
Nonstop9h 05m
Aer Lingus
Deal found 4/28$603

Find flight deals from Ireland to Seattle

Keep the following information in mind while searching for Ireland to Seattle flight deals. Data was last updated maio 1, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$568
(lol.travel)

One-way from

$368
(FlightHub)

Popular in

July

Cheapest in

February

Average price

$654

Good round-trip deal

$602 or less

Good one-way deal

$637 or less
Provider with most accurate pricing for Dublin-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Dublin-Seattle/Tacoma Intl flights.
Search Deals
From Ireland to Seattle/Tacoma Intl
Search Deals
One-way flight from Ireland to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 21% potential increase in price ($197 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($28 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2026
Search Deals
Price to beat on a round-trip flight from Ireland to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Ireland to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ireland to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated maio 1, 2026.
Use the filters below to find and compare flights from Ireland to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DublinSeattle

DUB - SEA

DUBSEA

Dublin

qui 6/4

3:30 pm-11:35 am

1 stop28h 05m

Seattle/Tacoma Intl

seg 6/8

8:20 pm-2:35 pm

1 stop34h 15m

$600

DublinSeattle

DUB - SEA

DUBSEA

Dublin

sex 5/15

9:30 am-10:38 pm

1 stop21h 08m

Seattle/Tacoma Intl

seg 6/8

10:27 am-11:50 am

1 stop17h 23m

$616

DublinSeattle

DUB - SEA

DUBSEA

Dublin

sex 5/15

5:55 am-7:05 pm

2 stops21h 10m

Seattle/Tacoma Intl

seg 6/8

6:50 pm-6:25 pm

1 stop15h 35m

$627

DublinSeattle

DUB - SEA

DUBSEA

Dublin

sex 5/22

5:55 am-4:37 pm

2 stops18h 42m

Seattle/Tacoma Intl

dom 5/24

10:35 pm-10:00 am

1 stop27h 25m

$628

DublinSeattle

DUB - SEA

DUBSEA

Dublin

qua 5/20

5:55 am-4:37 pm

2 stops18h 42m

Seattle/Tacoma Intl

sex 5/29

10:35 am-10:25 am

2 stops15h 50m

$630

DublinSeattle

DUB - SEA

DUBSEA

Dublin

sáb 9/26

8:00 pm-1:45 pm

2 stops25h 45m

Seattle/Tacoma Intl

dom 10/4

3:55 pm-6:20 pm

1 stop18h 25m

$639

CorkSeattle

ORK - SEA

ORKSEA

Cork

qui 5/14

10:50 am-11:42 am

1 stop32h 52m

Seattle/Tacoma Intl

ter 5/19

9:30 am-10:20 am

2 stops16h 50m

$677

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

qui 5/28

9:15 pm-11:35 am

1 stop22h 20m

Seattle/Tacoma Intl

seg 6/1

1:30 pm-8:35 pm

1 stop23h 05m

$756

CorkSeattle

ORK - SEA

ORKSEA

Cork

qui 6/4

4:10 pm-11:35 am

1 stop27h 25m

Seattle/Tacoma Intl

seg 6/8

1:30 pm-3:10 pm

1 stop17h 40m

$756

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

qui 5/21

9:15 pm-4:44 pm

2 stops27h 29m

Seattle/Tacoma Intl

seg 5/25

6:00 am-11:20 am

2 stops21h 20m

$769

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 36 resultsSorted by cheapest first
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Best time to book a flight from Ireland to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ireland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Ireland to Seattle

How far ahead should I book a flight from Ireland to Seattle?

The price you pay for your flight from Ireland to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 48 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Ireland to Seattle?

Currently, September is the cheapest month in which you can book a flight from Ireland to Seattle (average of $429). Flying from Ireland to Seattle in July is currently the most expensive (average of $750). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IE to SEA?

Find hourly flight availability from Ireland to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated maio 1, 2026.

When flying from Ireland to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How often are flights from Ireland to Seattle delayed?

About 9% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 158 minutes.

What is the most punctual flight time for Ireland to Seattle flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ireland to Seattle flights?

Over the last year, Aer Lingus have had the lowest number of delays on this route, with just 9% of flights being delayed.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated maio 1, 2026.
Read through reviews of airlines operating flights from Ireland to Seattle, such as Aer Lingus. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,538 reviews

Crew

8.1

Boarding

7.4

Food

6.6

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

DUB - EDI

Fine except for app. Couldn’t check in online - kept saying I couldn’t check in until the morning after my flight. On second leg I could check in but couldn’t get my boarding pass into my wallet. Thankfully I took a screenshot of it because I couldn’t retrieve it when we boarded - the app prohibited it.
Aer Lingus
7.3
Good
1,538 reviews
Aer Lingus
7.3
Good
1,538 reviews

Crew

8.1

Boarding

7.4

Food

6.6

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
8.0
Excellent

Anonymous,Nov 2025

DUB - EDI

Fine except for app. Couldn’t check in online - kept saying I couldn’t check in until the morning after my flight. On second leg I could check in but couldn’t get my boarding pass into my wallet. Thankfully I took a screenshot of it because I couldn’t retrieve it when we boarded - the app prohibited it.

Related info for your journey

Find useful and relevant information for your journey from Ireland to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Ireland?

    If you book a flight to Seattle from Ireland, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How long is the flight from Ireland to Seattle?

    A quick flight from Ireland to Seattle can take about 21h 08m. British Airways provides one of the quickest options available for as low as $616. There are 4523 mi between Ireland and Seattle. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Ireland to Seattle one-way?

    One-way options have recently been found by users for as low as $330 on WestJet. Other airlines that offer cheap prices include Icelandair from $414 and Aer Lingus from $554 one-way.

  • What are the most popular routes from Ireland to Seattle?

    The most popular route from Ireland to Seattle is Dublin - Seattle/Tacoma Intl. You may also consider Shannon - Seattle/Tacoma Intl or Cork - Seattle/Tacoma Intl.

  • What are the most reliable airlines from Ireland to Seattle?

    The top 3 most reliable airlines when flying from Ireland to Seattle are American Airlines (77%), Aer Lingus (77%) and Iberia (77%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $629 for a flight from Ireland to Seattle. The cheapest flight overall is $600 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $567.

  • Can I find deals for flights from Ireland to Seattle that include hotel bookings?

    Yes. In addition to deals on Ireland to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Seattle.

  • Can I find deals for business class flights from Ireland to Seattle?

    Yes. Cheapflights offers flight deals from Ireland to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Ireland to Seattle?

    Currently, September is the cheapest month in which you can book a flight from Ireland to Seattle (average of $429). Flying from Ireland to Seattle in July is currently the most expensive (average of $750). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Tumwater
Tukwila
Puyallup
Kent
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Ireland to Seattle

Discover the top airline that operate flights from Ireland to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated maio 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$523Average$699FlexibilityNo cancel feeOn-timeN/A

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