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Ireland

$243+ Cheap flights from Seattle (SEA) to Ireland

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 10/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
Aug 31 — Sep 71
Mon 8/31
Mon 9/7
1 adult, Economy
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Cheap flight deals from Seattle to Ireland

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

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.
Sat 9/121:30 pm
SEA
-
SNN
1 stop13h 50m
British Airways
Sun 9/204:50 pm
SNN
-
SEA
1 stop26h 45m
British Airways
Deal found 7/28$598
This Cheapflightsfares deal was found by Cheapflights users on 7/30. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:40 pm
SEA
-
DUB
1 stop11h 25m
Icelandair
Thu 9/102:15 pm
DUB
-
SEA
1 stop11h 40m
Icelandair
Deal found 7/30$717
This Mytrip deal was found by Cheapflights users on 7/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/273:40 pm
SEA
-
DUB
3 stops32h 40m
Multiple Airlines
Thu 9/35:55 am
DUB
-
SEA
3 stops22h 45m
Multiple Airlines
Deal found 7/30$718
This Mytrip deal was found by Cheapflights users on 7/31. 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.
Mon 8/318:00 am
SEA
-
DUB
3 stops26h 20m
Multiple Airlines
Mon 9/76:55 pm
DUB
-
SEA
2 stops30h 04m
Multiple Airlines
Deal found 7/31$719
This Cheapflightsfares deal was found by Cheapflights users on 7/31. 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 10/163:40 pm
SEA
-
DUB
1 stop13h 35m
Icelandair
Mon 10/192:15 pm
DUB
-
SEA
1 stop11h 40m
Icelandair
Deal found 7/31$720
This Kiwi.com deal was found by Cheapflights users on 7/31. 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.
Thu 8/2011:25 pm
SEA
-
DUB
1 stop29h 50m
Icelandair
Wed 8/2612:15 pm
DUB
-
SEA
1 stop13h 40m
Icelandair
Deal found 7/31$722
This Icelandair deal was found by Cheapflights users on 7/31. 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.
Thu 8/2011:25 pm
SEA
-
DUB
1 stop29h 50m
Icelandair
Fri 8/2812:15 pm
DUB
-
SEA
1 stop16h 25m
Icelandair
Deal found 7/31$723
This Kiwi.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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/77:00 pm
SEA
-
DUB
2 stops28h 15m
Multiple Airlines
Tue 10/131:00 pm
DUB
-
SEA
1 stop13h 45m
Multiple Airlines
Deal found 7/28$724
This Mytrip deal was found by Cheapflights users on 7/29. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/177:00 pm
SEA
-
DUB
3 stops29h 20m
Multiple Airlines
Tue 8/257:05 pm
DUB
-
SEA
3 stops33h 35m
Multiple Airlines
Deal found 7/29$725
This oojo deal was found by Cheapflights users on 7/31. 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.
Tue 9/13:40 pm
SEA
-
DUB
1 stop11h 25m
Icelandair
Tue 9/82:15 pm
DUB
-
SEA
1 stop29h 30m
Icelandair
Deal found 7/31$726
This deal was found by Cheapflights users on 7/31. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/23:40 pm
SEA
-
DUB
1 stop13h 35m
Icelandair
Sun 10/412:15 pm
DUB
-
SEA
1 stop16h 25m
Icelandair
Deal found 7/31$727
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.
Sat 9/127:10 pm
SEA
-
DUB
Nonstop9h 05m
Multiple Airlines
Sun 9/209:30 am
DUB
-
SEA
1 stop32h 21m
Multiple Airlines
Deal found 7/28$730

Find flight deals from Seattle to Ireland

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

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$598
(Trip.com)

One-way from

$245
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$778

Good round-trip deal

$919 or less

Good one-way deal

$458 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Dublin flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Dublin flights.
Search Deals
From Seattle/Tacoma Intl to Ireland
Search Deals
One-way flight from Seattle/Tacoma Intl to Ireland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($172 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 August 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Ireland.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Ireland.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Ireland 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 August 1, 2026.
Use the filters below to find and compare flights from Seattle to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 9/20

9:40 pm-9:00 am

1 stop27h 20m

Dublin

Tue 10/6

10:40 am-10:31 pm

1 stop19h 51m

$751

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 8/31

11:04 pm-10:15 am

2 stops27h 11m

Shannon

Tue 9/15

9:30 am-4:07 pm

1 stop14h 37m

$807

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 9/15

7:00 am-7:30 am

1 stop16h 30m

Shannon

Tue 9/22

9:30 am-4:07 pm

1 stop14h 37m

$830

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 10/20

7:15 pm-9:35 am

1 stop30h 20m

Dublin

Thu 10/29

6:10 am-6:10 pm

1 stop19h 00m

$841

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Mon 10/26

3:25 pm-4:40 pm

1 stop18h 15m

Cork

Tue 11/10

5:40 am-11:47 am

1 stop14h 07m

$872

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Wed 9/9

7:15 am-10:20 am

2 stops19h 05m

Cork

Wed 9/16

10:50 am-11:00 pm

2 stops20h 10m

$881

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 8/27

1:00 pm-10:15 am

1 stop13h 15m

Shannon

Thu 9/3

9:30 am-9:15 pm

2 stops19h 45m

$882

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Sun 8/30

5:00 am-7:30 am

2 stops18h 30m

Shannon

Sun 9/6

9:30 am-11:04 pm

2 stops21h 34m

$884

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 10/1

11:59 pm-10:15 am

2 stops26h 16m

Shannon

Tue 10/6

12:30 pm-9:55 pm

1 stop17h 25m

$884

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 9/14

8:40 am-10:15 am

2 stops17h 35m

Shannon

Mon 9/21

9:30 am-4:07 pm

1 stop14h 37m

$890

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 40 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland from Seattle 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 Seattle to Ireland

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

Currently, February is the cheapest month in which you can book a flight from Seattle to Ireland (average of $464). Flying from Seattle to Ireland in June is currently the most expensive (average of $1,031). 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 SEA to IE?

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

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Ireland as you normally would.

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

Booking 90 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Ireland. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Ireland

Get insights into the airlines that provide service to Ireland. 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 Ireland. Reviews last updated August 1, 2026.
Read reviews from past customers who have flown United Airlines,Aer Lingus, andAmerican Airlines from Seattle to Ireland. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
10,063 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Boarding

7.7

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
United Airlines
7.4
Good
10,063 reviews
United Airlines
7.4
Good
10,063 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Boarding

7.7

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
Aer Lingus
7.3
Good
1,683 reviews
United Airlines
7.4
Good
10,063 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Boarding

7.7

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
American Airlines
7.1
Good
11,849 reviews
United Airlines
7.4
Good
10,063 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Boarding

7.7

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
Icelandair
7.0
Good
716 reviews
United Airlines
7.4
Good
10,063 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Boarding

7.7

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.
British Airways
6.7
Okay
8,137 reviews
United Airlines
7.4
Good
10,063 reviews

Entertainment

7.1

Crew

8.1

Comfort

7.3

Food

6.7

Boarding

7.7

Overall

7.4

Reviews

1 / 20
6.0
Good

Dawn,Jul 2026

ORD - GRR

The crew aboard the plane were not very friendly. They definitely acted like it was a chore to be there.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Ireland. 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 from for flights from Seattle to Ireland?

    Located just 11.4 mi from the city center, Seattle/Tacoma Intl (SEA) is the airport most travelers will use when flying to Ireland from Seattle.

  • How popular is this Seattle to Ireland flight route?

    This flight path from Seattle/Tacoma Intl to Ireland was viewed by 8 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 Seattle to Ireland?

    There are many flights that can get you from Seattle to Ireland in 11h 40m. Fly via Icelandair, United Airlines, or Delta to get the fastest option. Airlines will cover a distance of 4523 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at $169. WestJet flights start at $212 while deals on Aer Lingus start at $316 one-way.

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

    The most popular flight routes from Seattle to Ireland are Seattle/Tacoma Intl - Dublin, Seattle/Tacoma Intl - Shannon and Seattle/Tacoma Intl - Cork.

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

    No one likes to see their flight delayed. When booking a flight from Seattle to Ireland consider choosing American Airlines (78%), Aer Lingus (78%) or Iberia (78%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Ireland?

    Looking for the cheapest flight from Seattle to Ireland? While on average our users pay $2,423, our data indicates the cheapest price to be $354. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around $569.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Ireland 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 Seattle to Ireland?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Ireland (average of $464). Flying from Seattle to Ireland in June is currently the most expensive (average of $1,031). 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

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 10 airlines flying from Seattle to Ireland

Discover the top 10 airlines that operate flights from Seattle to Ireland. 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 August 1, 2026.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$161Average$961FlexibilityNo cancel feeOn-time62%
Air CanadaCheapest$341Average$581FlexibilityNo cancel feeOn-time67%
IcelandairCheapest$348Average$508FlexibilityNo cancel feeOn-time76%
KLMCheapest$405Average$757FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$407Average$897FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$438Average$738FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$444Average$640FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$457Average$605FlexibilityNo cancel feeOn-time76%
IberiaCheapest$457Average$879FlexibilityNo cancel feeOn-time77%
British AirwaysCheapest$464Average$670FlexibilityNo cancel feeOn-time70%

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