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$335+ 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 4/13. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
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 March 16, 2026.

This Icelandair deal was found by Cheapflights users on 3/15. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/911:30 am
DUB
-
SEA
1 stop13h 30m
Icelandair
Wed 12/162:35 pm
SEA
-
DUB
1 stop11h 40m
Icelandair
Deal found 3/15$482
This Gotogate deal was found by Cheapflights users on 3/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/812:15 pm
DUB
-
SEA
1 stop16h 25m
Icelandair
Wed 4/153:40 pm
SEA
-
DUB
1 stop13h 35m
Icelandair
Deal found 3/13$511
This oojo deal was found by Cheapflights users on 3/15. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/1512:15 pm
DUB
-
SEA
1 stop16h 25m
Icelandair
Wed 4/223:40 pm
SEA
-
DUB
1 stop13h 35m
Icelandair
Deal found 3/15$514
This Mytrip deal was found by Cheapflights users on 3/14. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/302:15 pm
DUB
-
SEA
1 stop11h 40m
Icelandair
Mon 5/43:40 pm
SEA
-
DUB
1 stop13h 35m
Icelandair
Deal found 3/14$517
This Gotogate deal was found by Cheapflights users on 3/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/812:15 pm
DUB
-
SEA
1 stop13h 40m
Icelandair
Mon 4/273:40 pm
SEA
-
DUB
1 stop13h 35m
Icelandair
Deal found 3/13$519
This Mytrip deal was found by Cheapflights users on 3/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:15 pm
DUB
-
SEA
1 stop11h 40m
Icelandair
Tue 6/3011:25 pm
SEA
-
DUB
1 stop29h 50m
Icelandair
Deal found 3/15$523
This Mytrip deal was found by Cheapflights users on 3/15. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2912:15 pm
DUB
-
SEA
1 stop13h 40m
Icelandair
Wed 5/63:40 pm
SEA
-
DUB
1 stop13h 35m
Icelandair
Deal found 3/15$525
This KLM deal was found by Cheapflights users on 3/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:15 am
ORK
-
SEA
1 stop13h 30m
KLM
Thu 4/165:35 pm
SEA
-
ORK
1 stop21h 00m
KLM
Deal found 3/11$599
This Delta deal was found by Cheapflights users on 3/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/96:15 am
ORK
-
SEA
1 stop13h 30m
Delta
Thu 4/167:15 am
SEA
-
ORK
2 stops19h 05m
Delta
Deal found 3/11$602
This Delta deal was found by Cheapflights users on 3/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/236:15 am
ORK
-
SEA
1 stop13h 27m
Delta
Mon 6/11:30 pm
SEA
-
ORK
1 stop17h 10m
Delta
Deal found 3/13$615
This KLM deal was found by Cheapflights users on 3/14. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/305:10 pm
ORK
-
SEA
1 stop26h 35m
KLM
Sun 4/55:35 pm
SEA
-
ORK
1 stop32h 45m
KLM
Deal found 3/14$618
This British Airways deal was found by Cheapflights users on 3/11. 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 6/34:50 pm
SNN
-
SEA
1 stop26h 45m
British Airways
Sun 6/78:20 pm
SEA
-
SNN
1 stop16h 15m
British Airways
Deal found 3/11$726

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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$511
(Gotogate)

One-way from

$335
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$716

Good round-trip deal

$702 or less

Good one-way deal

$583 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. 19% potential increase in price ($171 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 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 March 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

Wed 4/15

12:15 pm-5:55 pm

1 stop13h 40m

Seattle/Tacoma Intl

Sun 4/19

3:40 pm-1:15 pm

1 stop13h 35m

$545
Quickest round-trip

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 9/1

2:15 pm-8:40 pm

1 stop14h 25m

Seattle/Tacoma Intl

Tue 9/22

3:40 pm-11:05 am

1 stop11h 25m

$552

CorkSeattle

ORK - SEA

ORKSEA

Cork

Thu 4/9

6:15 am-11:45 am

1 stop13h 30m

Seattle/Tacoma Intl

Thu 4/16

5:35 pm-10:35 pm

1 stop21h 00m

$599

CorkSeattle

ORK - SEA

ORKSEA

Cork

Thu 4/9

6:15 am-6:26 pm

2 stops20h 11m

Seattle/Tacoma Intl

Thu 4/16

8:50 am-10:20 am

2 stops17h 30m

$607

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 5/18

5:55 am-4:30 pm

1 stop18h 35m

Seattle/Tacoma Intl

Thu 5/28

7:30 am-10:25 am

2 stops18h 55m

$616

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 5/15

5:55 am-11:42 am

1 stop13h 47m

Seattle/Tacoma Intl

Mon 6/8

6:45 pm-6:25 pm

1 stop15h 40m

$617

CorkSeattle

ORK - SEA

ORKSEA

Cork

Mon 3/30

5:10 pm-11:45 am

1 stop26h 35m

Seattle/Tacoma Intl

Sun 4/5

5:35 pm-10:20 am

1 stop32h 45m

$618

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 4/9

11:10 am-4:30 pm

1 stop13h 20m

Seattle/Tacoma Intl

Thu 4/16

7:15 am-10:25 am

2 stops19h 10m

$619

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 9/7

7:05 pm-1:45 pm

1 stop26h 40m

Seattle/Tacoma Intl

Mon 9/28

2:30 pm-11:50 am

2 stops37h 20m

$620

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 4/6

11:10 am-4:30 pm

1 stop13h 20m

Seattle/Tacoma Intl

Sun 4/19

12:00 pm-9:15 am

1 stop13h 15m

$620

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/14

Showing 1-10 of 27 resultsSorted by cheapest first
1
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3

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, September is the cheapest month in which you can book a flight from Ireland to Seattle (average of $453). Flying from Ireland to Seattle in July is currently the most expensive (average of $786). 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 March 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 9% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 163 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 March 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
7.2
Good
1,477 reviews

Boarding

7.4

Entertainment

7.0

Comfort

7.1

Overall

7.2

Food

6.6

Crew

8.1

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
7.2
Good
1,477 reviews
Aer Lingus
7.2
Good
1,477 reviews

Boarding

7.4

Entertainment

7.0

Comfort

7.1

Overall

7.2

Food

6.6

Crew

8.1

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 popular is this Ireland to Seattle flight route?

    This flight path from Ireland to Seattle/Tacoma Intl was viewed by 2 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Ireland to Seattle?

    A quick flight from Ireland to Seattle can take about 13h 30m. Icelandair provides one of the quickest options available for as low as $599. There are 4541 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 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 (82%), Aer Lingus (82%) and Iberia (82%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $926 for a flight from Ireland to Seattle. The cheapest flight overall is $551 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $513.

  • 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 $453). Flying from Ireland to Seattle in July is currently the most expensive (average of $786). 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
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Kent
Lynnwood
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Renton
Puyallup
Kirkland
Ellensburg
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Federal Way

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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$523Average$712FlexibilityNo cancel feeOn-timeN/A

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