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$374+ 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 8/27. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
Aug 28 — Sep 41
Fri 8/28
Fri 9/4
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 July 29, 2026.

This flugladen.de deal was found by Cheapflights users on 7/28. 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 flugladen.de is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:30 am
DUB
-
SEA
1 stop19h 22m
Iberia
Sat 9/127:10 pm
SEA
-
DUB
Nonstop9h 05m
Iberia
Deal found 7/28$511
This Trip.com deal was found by Cheapflights users on 7/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/279:20 am
DUB
-
SEA
1 stop19h 47m
Air Canada
Sat 9/128:00 am
SEA
-
DUB
1 stop16h 15m
Air Canada
Deal found 7/28$538
This lol.travel deal was found by Cheapflights users on 7/27. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/37:05 pm
DUB
-
SEA
1 stop26h 40m
Scandinavian Airlines
Sat 9/193:55 pm
SEA
-
DUB
2 stops18h 30m
Scandinavian Airlines
Deal found 7/27$560
This oojo deal was found by Cheapflights users on 7/24. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/117:05 pm
DUB
-
SEA
1 stop26h 40m
Scandinavian Airlines
Tue 9/223:55 pm
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 7/24$578
This Expedia deal was found by Cheapflights users on 7/25. 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.
Sat 9/197:05 pm
DUB
-
SEA
1 stop26h 40m
Scandinavian Airlines
Sat 9/263:55 pm
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 7/25$582
This Trip.com deal was found by Cheapflights users on 7/26. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:05 pm
DUB
-
SEA
1 stop26h 40m
Scandinavian Airlines
Fri 9/113:55 pm
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 7/26$584
This Cheapflightsfares deal was found by Cheapflights users on 7/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/47:50 pm
DUB
-
SEA
2 stops25h 55m
Scandinavian Airlines
Sun 9/133:55 pm
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 7/26$586
This Expedia deal was found by Cheapflights users on 7/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:05 pm
DUB
-
SEA
1 stop26h 40m
Scandinavian Airlines
Fri 9/253:55 pm
SEA
-
DUB
2 stops19h 20m
Scandinavian Airlines
Deal found 7/28$589
This British Airways deal was found by Cheapflights users on 7/28. 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.
Wed 11/118:05 pm
SNN
-
SEA
1 stop23h 20m
British Airways
Sun 11/1510:41 am
SEA
-
SNN
2 stops16h 49m
British Airways
Deal found 7/28$849
This British Airways deal was found by Cheapflights users on 7/28. 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.
Thu 11/267:20 pm
ORK
-
SEA
2 stops29h 30m
British Airways
Mon 11/306:45 pm
SEA
-
ORK
1 stop32h 25m
British Airways
Deal found 7/28$877
This American Airlines deal was found by Cheapflights users on 7/28. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/267:40 am
ORK
-
SEA
1 stop17h 10m
American Airlines
Mon 11/306:45 pm
SEA
-
ORK
1 stop12h 40m
American Airlines
Deal found 7/28$937
This United Airlines deal was found by Cheapflights users on 7/25. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/912:30 pm
SNN
-
SEA
2 stops18h 15m
United Airlines
Sun 9/139:00 am
SEA
-
SNN
2 stops17h 15m
United Airlines
Deal found 7/25$949

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 July 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$511
(flugladen.de)

One-way from

$374
(JetBlue)

Popular in

July

Cheapest in

November

Average price

$1,041

Good round-trip deal

$780 or less

Good one-way deal

$716 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. 22% potential increase in price ($217 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 July 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 July 29, 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

Sat 9/26

8:00 pm-1:45 pm

2 stops25h 45m

Seattle/Tacoma Intl

Sun 10/4

3:55 pm-6:20 pm

1 stop18h 25m

$602

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 8/29

8:00 pm-1:45 pm

2 stops25h 45m

Seattle/Tacoma Intl

Sat 9/12

3:55 pm-10:25 am

2 stops34h 30m

$641

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 9/21

7:50 pm-1:45 pm

2 stops25h 55m

Seattle/Tacoma Intl

Tue 9/29

10:55 am-6:20 pm

2 stops23h 25m

$699

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/17

11:10 am-4:35 pm

1 stop13h 25m

Seattle/Tacoma Intl

Thu 10/8

1:30 pm-3:25 pm

1 stop17h 55m

$750

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 9/23

8:55 am-4:35 pm

1 stop15h 40m

Seattle/Tacoma Intl

Thu 10/15

1:30 pm-3:25 pm

1 stop17h 55m

$750
Quickest round-trip

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 9/8

5:55 am-11:47 am

1 stop13h 52m

Seattle/Tacoma Intl

Tue 9/15

6:45 pm-6:25 pm

1 stop15h 40m

$750

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 10/10

5:55 am-11:52 am

1 stop13h 57m

Seattle/Tacoma Intl

Fri 10/23

9:36 am-10:25 am

2 stops16h 49m

$754

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 9/7

8:55 am-4:35 pm

1 stop15h 40m

Seattle/Tacoma Intl

Mon 9/28

9:30 am-10:25 am

2 stops16h 55m

$756

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Wed 11/11

8:05 pm-11:25 am

1 stop23h 20m

Seattle/Tacoma Intl

Sun 11/15

10:41 am-11:30 am

2 stops16h 49m

$849

CorkSeattle

ORK - SEA

ORKSEA

Cork

Thu 11/26

7:20 pm-4:50 pm

2 stops29h 30m

Seattle/Tacoma Intl

Mon 11/30

6:45 pm-11:10 am

1 stop32h 25m

$877

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 30 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

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

Currently, November is the cheapest month in which you can book a flight from Ireland to Seattle (average of $559). Flying from Ireland to Seattle in July is currently the most expensive (average of $1,041). 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 July 29, 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.

Weekly flight availability from Ireland to Seattle

Explore weekly flight availability from Ireland to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated July 29, 2026.

The most flights from IE0 to SEA are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

How often are flights from Ireland to Seattle delayed?

About 10% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 179 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?

Thursday 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 10% of flights being delayed.

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 52 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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 July 29, 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
1,682 reviews

Entertainment

7.0

Boarding

7.4

Crew

8.1

Comfort

7.2

Food

6.7

Overall

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.
Aer Lingus
7.3
Good
1,682 reviews
Aer Lingus
7.3
Good
1,682 reviews

Entertainment

7.0

Boarding

7.4

Crew

8.1

Comfort

7.2

Food

6.7

Overall

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,May 2026

DUB - EWR

Underpricer is a terrible organization that inserted itself as a “travel agent” simply by way of me booking on kayak. Never would I have willing assented to using underpricer. Further, we had a problem whereby two duplicate one-way flights from Dublin were inadvertently booked for me and my wife, stemming from a family emergency. My wife’s sister / my sister in law had a brain tumor and immediate surgery to remove it, which obviously impacted our previously planned travel arrangements. I tried to cancel the flight due to the extenuating circumstances. Underpricer said canceling was not possible, but a credit would be possible for the exact same flight - one way from Dublin - to be used in one year from the original flight date. I asked if it would be possible to make the credit a general credit to any participating AerLingus airport destination, which would allow more flexibility than having to go back to Ireland within a year. In order to pursue the credit, Underpricer requested documentary proof regarding my sister in laws brain tumor, which we gave them. Underpricer then asked us to document our relationship to the patient - so I gave them my marriage certificate to evidence my wife and her sister having the same last name. Underpricer asked for further proof, so we gave them copies of my passport, my wife’s passport, and my sister in laws passport. All of these hoops to jump through for Underpricer, with sporadic communication on their part throughout, only for them to say 3 days before the original booking that no credit was available - not even the one they originally offered. They said my only option was to pick a date within the next year to move the flight to - and of course to make that change, they charged me an additional $350 fee just to make that change. What a pathetic, fraudulent organization. Kayak should be embarrassed to be associated with Underpricer and should cease that relationship immediately. And for AerLingus, who only Underpricer could talk to regarding the booking (I was not permitted) to not understand our family’s situation and just stand by blanket policy that no credit is permitted, is equally disappointing.

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 13h 25m. Scandinavian Airlines provides one of the quickest options available for as low as $750. 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 $497 and Aer Lingus from $565 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 Cork - Seattle/Tacoma Intl or Shannon - 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 (78%), Aer Lingus (78%) and Iberia (78%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $935 for a flight from Ireland to Seattle. The cheapest flight overall is $645 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $560.

  • 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, November is the cheapest month in which you can book a flight from Ireland to Seattle (average of $559). Flying from Ireland to Seattle in July is currently the most expensive (average of $1,041). 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
Renton
Tacoma
Lacey
Leavenworth
Olympia
Edmonds
Tukwila
Snoqualmie
Tumwater
Centralia
Puyallup
Kent
Ellensburg
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Ocean Shores
Lakewood
Lynnwood
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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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 July 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$532Average$713FlexibilityNo cancel feeOn-timeN/A

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