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$375+ 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 8/10. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
Jul 16 — Jul 231
Thu 7/16
Thu 7/23
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 June 16, 2026.

This Gotogate deal was found by Cheapflights users on 6/14. 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.
Sun 9/2010:00 am
DUB
-
SEA
2 stops59h 45m
Scandinavian Airlines
Fri 9/253:55 pm
SEA
-
DUB
1 stop33h 30m
Scandinavian Airlines
Deal found 6/14$614
This Scandinavian Airlines deal was found by Cheapflights users on 6/11. 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 Scandinavian Airlines 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
Tue 9/293:55 pm
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 6/11$620
This Scandinavian Airlines deal was found by Cheapflights users on 6/14. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/268:00 pm
DUB
-
SEA
2 stops25h 45m
Scandinavian Airlines
Sun 10/43:55 pm
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 6/14$629
This Booking.com deal was found by Cheapflights users on 6/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/187:50 pm
DUB
-
SEA
2 stops25h 55m
Scandinavian Airlines
Fri 10/93:55 pm
SEA
-
DUB
1 stop33h 30m
Scandinavian Airlines
Deal found 6/11$632
This British Airways deal was found by Cheapflights users on 6/11. 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 11/198:05 pm
SNN
-
SEA
1 stop28h 50m
British Airways
Mon 11/232:46 pm
SEA
-
SNN
2 stops17h 59m
British Airways
Deal found 6/11$850
This Kiwi.com deal was found by Cheapflights users on 6/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/57:30 am
SNN
-
SEA
2 stops17h 40m
Multiple Airlines
Mon 8/319:45 pm
SEA
-
SNN
1 stop27h 45m
Multiple Airlines
Deal found 6/13$926
This Delta deal was found by Cheapflights users on 6/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/196:15 am
ORK
-
SEA
1 stop18h 09m
Delta
Tue 6/231:55 pm
SEA
-
ORK
1 stop12h 25m
Delta
Deal found 6/12$949
This United Airlines deal was found by Cheapflights users on 6/13. 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.
Fri 10/212:30 pm
SNN
-
SEA
1 stop17h 25m
United Airlines
Tue 10/612:59 pm
SEA
-
SNN
1 stop13h 16m
United Airlines
Deal found 6/13$958
This Air France deal was found by Cheapflights users on 6/15. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:15 am
ORK
-
SEA
1 stop18h 05m
Multiple Airlines
Thu 7/91:30 pm
SEA
-
ORK
1 stop17h 10m
Multiple Airlines
Deal found 6/15$958
This Air France deal was found by Cheapflights users on 6/16. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/26:15 am
ORK
-
SEA
1 stop18h 05m
Multiple Airlines
Wed 7/81:30 pm
SEA
-
ORK
1 stop17h 10m
Multiple Airlines
Deal found 6/16$960
This British Airways deal was found by Cheapflights users on 6/11. 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 9/2311:25 am
ORK
-
SEA
1 stop32h 10m
British Airways
Sun 9/276:15 am
SEA
-
ORK
2 stops20h 30m
British Airways
Deal found 6/11$967
This KLM deal was found by Cheapflights users on 6/12. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/271:05 pm
SNN
-
SEA
1 stop15h 23m
KLM
Mon 8/37:15 am
SEA
-
SNN
1 stop19h 55m
KLM
Deal found 6/12$968

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 June 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$614
(Gotogate)

One-way from

$375
(Super.com)

Popular in

July

Cheapest in

November

Average price

$788

Good round-trip deal

$628 or less

Good one-way deal

$645 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. 20% potential increase in price ($188 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($30 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 June 16, 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

$629

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 9/2

8:55 am-4:35 pm

1 stop15h 40m

Seattle/Tacoma Intl

Wed 9/9

9:05 am-7:55 am

1 stop14h 50m

$689

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 10/10

5:55 am-11:52 am

1 stop13h 57m

Seattle/Tacoma Intl

Fri 10/23

7:30 am-12:40 pm

2 stops21h 10m

$691
Quickest round-trip

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 10/10

5:55 am-11:52 am

1 stop13h 57m

Seattle/Tacoma Intl

Fri 10/23

8:25 am-7:55 am

1 stop15h 30m

$692

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 9/2

5:55 am-7:05 pm

2 stops21h 10m

Seattle/Tacoma Intl

Wed 9/9

9:05 am-7:55 am

1 stop14h 50m

$695

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 9/1

8:55 am-8:35 pm

2 stops19h 40m

Seattle/Tacoma Intl

Wed 9/30

9:30 am-10:25 am

2 stops16h 55m

$703

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 8/1

2:15 pm-8:40 pm

1 stop14h 25m

Seattle/Tacoma Intl

Mon 8/10

11:25 pm-11:05 am

1 stop27h 40m

$789

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 9/4

7:05 pm-1:45 pm

1 stop26h 40m

Seattle/Tacoma Intl

Tue 9/8

12:00 pm-6:20 pm

2 stops22h 20m

$789

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Thu 11/19

8:05 pm-4:55 pm

1 stop28h 50m

Seattle/Tacoma Intl

Mon 11/23

6:50 pm-4:45 pm

1 stop13h 55m

$850

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Fri 10/2

12:30 pm-9:55 pm

1 stop17h 25m

Seattle/Tacoma Intl

Tue 10/6

12:59 pm-10:15 am

1 stop13h 16m

$958

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/14

Showing 1-10 of 32 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, August is the cheapest month in which you can book a flight from Ireland to Seattle (average of $430). 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 June 16, 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 10% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 168 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 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 51 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 June 16, 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
1,604 reviews

Boarding

7.4

Crew

8.1

Food

6.7

Comfort

7.2

Overall

7.3

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Lama,May 2026

DUB - ALC

Seats were super small, there was no food, and they lost my bag.
Aer Lingus
7.3
Good
1,604 reviews
Aer Lingus
7.3
Good
1,604 reviews

Boarding

7.4

Crew

8.1

Food

6.7

Comfort

7.2

Overall

7.3

Entertainment

7.0

Reviews

1 / 20
4.0
Okay

Lama,May 2026

DUB - ALC

Seats were super small, there was no food, and they lost my bag.

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 57m. Scandinavian Airlines provides one of the quickest options available for as low as $692. 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 $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 (80%), Aer Lingus (80%) and Iberia (80%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $1,178 for a flight from Ireland to Seattle. The cheapest flight overall is $595 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $614.

  • 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, August is the cheapest month in which you can book a flight from Ireland to Seattle (average of $430). 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
Lacey
Ocean Shores
Leavenworth
Olympia
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Snoqualmie
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Tukwila
Puyallup
Kent
Lynnwood
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Fife
Lakewood
Issaquah
Shoreline
Marysville

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 June 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$532Average$686FlexibilityNo cancel feeOn-timeN/A

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