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Cheap flights from Seattle to Ireland from C$ 373

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
25 Aug — 1 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Seattle to Ireland

Enter your travel dates to find the best prices.

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 26 July 2026.

Fri 4/911:25 p.m.
SEA
-
DUB
1 stop27h 40m
Icelandair
Thu 17/92:15 p.m.
DUB
-
SEA
1 stop14h 25m
Icelandair
Deal found 25/7C$ 1,019
Wed 28/103:35 p.m.
SEA
-
DUB
1 stop11h 40m
Icelandair
Thu 12/1111:30 a.m.
DUB
-
SEA
1 stop13h 30m
Icelandair
Deal found 24/7C$ 1,037
Sun 13/911:55 p.m.
SEA
-
DUB
2 stops50h 05m
TAP AIR PORTUGAL
Sun 20/96:50 p.m.
DUB
-
SEA
2 stops59h 48m
TAP AIR PORTUGAL
Deal found 21/7C$ 1,044
Sun 16/83:40 p.m.
SEA
-
DUB
1 stop13h 35m
Icelandair
Mon 24/82:15 p.m.
DUB
-
SEA
1 stop29h 30m
Icelandair
Deal found 20/7C$ 1,057
Thu 12/112:35 p.m.
SEA
-
DUB
1 stop11h 40m
Icelandair
Sat 16/111:30 a.m.
DUB
-
SEA
1 stop13h 30m
Icelandair
Deal found 24/7C$ 1,061
Fri 18/93:40 p.m.
SEA
-
DUB
1 stop13h 35m
Icelandair
Tue 22/92:15 p.m.
DUB
-
SEA
1 stop14h 25m
Icelandair
Deal found 24/7C$ 1,062
Sat 5/911:25 p.m.
SEA
-
DUB
1 stop29h 50m
Icelandair
Fri 18/912:15 p.m.
DUB
-
SEA
1 stop16h 25m
Icelandair
Deal found 25/7C$ 1,065
Fri 9/103:40 p.m.
SEA
-
DUB
1 stop13h 35m
Icelandair
Sun 11/1012:15 p.m.
DUB
-
SEA
1 stop13h 40m
Icelandair
Deal found 24/7C$ 1,067
Thu 29/103:35 p.m.
SEA
-
DUB
1 stop11h 40m
Icelandair
Fri 6/1111:30 a.m.
DUB
-
SEA
1 stop13h 30m
Icelandair
Deal found 24/7C$ 1,068
Sun 6/93:40 p.m.
SEA
-
DUB
1 stop13h 35m
Icelandair
Sun 20/1211:30 a.m.
DUB
-
SEA
1 stop13h 30m
Icelandair
Deal found 21/7C$ 1,078
Wed 4/112:35 p.m.
SEA
-
DUB
1 stop11h 40m
Icelandair
Tue 13/412:15 p.m.
DUB
-
SEA
1 stop13h 40m
Icelandair
Deal found 24/7C$ 1,088
Thu 3/911:25 p.m.
SEA
-
DUB
1 stop29h 50m
Icelandair
Thu 17/92:15 p.m.
DUB
-
SEA
1 stop11h 40m
Icelandair
Deal found 25/7C$ 1,095

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 26 July 2026.

Round-trip from

C$ 1,019

One-way from

C$ 373

Popular in

June

Cheapest in

February

Average price

C$ 1,229

Good one-way deal

C$ 631 or less
Icelandair
  • Icelandair
  • 4/9-17/9
  • 2 total stops
  • 42h 05m total
  • Seattle to Ireland
Search Deals
18/10
  • 18/10
  • 3 total stops
  • 35h 35m total
  • Seattle to Ireland
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (C$ 349 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 62 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
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 629,999 searches. Data last updated 26 July 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

Sat 5/9

11:25 p.m.-1:15 p.m.

1 stop29h 50m

Dublin

Thu 17/9

2:15 p.m.-8:40 p.m.

1 stop14h 25m

C$ 1,065

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 18/10

7:15 p.m.-11:05 p.m.

1 stop19h 50m

Dublin

Thu 29/10

4:35 p.m.-6:10 p.m.

1 stop32h 35m

C$ 1,185

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 17/11

7:00 a.m.-7:30 a.m.

2 stops16h 30m

Dublin

Tue 12/1

9:30 a.m.-6:59 p.m.

2 stops17h 29m

C$ 1,229
Quickest round-trip

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 18/11

8:30 a.m.-9:55 a.m.

2 stops17h 25m

Dublin

Wed 13/1

10:40 a.m.-6:59 p.m.

1 stop16h 19m

C$ 1,229

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 5/9

11:00 p.m.-7:45 a.m.

2 stops24h 45m

Dublin

Thu 17/9

9:50 a.m.-9:04 p.m.

1 stop19h 14m

C$ 1,232

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 16/11

8:10 a.m.-11:00 a.m.

2 stops18h 50m

Dublin

Fri 15/1

11:45 a.m.-12:14 a.m.

2 stops20h 29m

C$ 1,260

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 22/8

12:10 p.m.-9:45 a.m.

2 stops37h 35m

Dublin

Mon 31/8

9:50 a.m.-11:32 a.m.

2 stops33h 42m

C$ 1,284

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 5/9

11:04 p.m.-7:20 a.m.

1 stop24h 16m

Dublin

Sat 19/9

9:20 a.m.-10:47 p.m.

2 stops21h 27m

C$ 1,298

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 23/9

8:40 a.m.-11:10 a.m.

2 stops18h 30m

Dublin

Wed 30/9

9:20 a.m.-6:52 p.m.

2 stops17h 32m

C$ 1,375

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 27/8

11:25 p.m.-1:15 p.m.

1 stop29h 50m

Dublin

Sat 5/9

10:25 a.m.-8:40 p.m.

2 stops18h 15m

C$ 1,426

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/7

Showing 1-10 of 24 resultsSorted by cheapest first
1
2
3

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 C$ 654). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,453). 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 26 July 2026.

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

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 26 July 2026.
Read through reviews of airlines operating flights from Seattle to Ireland, such as Aer Lingus. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.3
Good
1,679 reviews
Check prices

Comfort

7.2

Food

6.7

Entertainment

7.0

Boarding

7.4

Crew

8.1

Overall

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

BOS - SNN

Seats were very uncomfortable and mine was falling apart. My entertainment system didn’t work at all, just a black screen. It was hot in the plane, the airflow alternated between room temperature and warm. The food was gross.
Aer Lingus
7.3
Good
1,679 reviews
Aer Lingus
7.3
Good
1,679 reviews
Check prices

Comfort

7.2

Food

6.7

Entertainment

7.0

Boarding

7.4

Crew

8.1

Overall

7.3

Reviews

1 / 20
4.0
Okay

Anonymous,Jun 2026

BOS - SNN

Seats were very uncomfortable and mine was falling apart. My entertainment system didn’t work at all, just a black screen. It was hot in the plane, the airflow alternated between room temperature and warm. The food was gross.

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?

    If you book a flight to Ireland from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 18.4 km from the centre of Seattle.

  • How popular is this Seattle to Ireland flight route?

    This flight path from Seattle/Tacoma Intl to Ireland was viewed by 55 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?

    For as low as C$ 1,229, Icelandair can have you in Ireland from Seattle in 16h 30m. Seattle and Ireland are separated by a distance of 7279 km. Both multi-stop and direct flights can be found to your destination and back.

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

    Before booking your flight to Ireland from Seattle, check out the most reliable airlines to get you to your destination on time: American Airlines (78%), Aer Lingus (78%), Iberia( 78%).

  • What are the cheapest flights from Seattle to Ireland?

    Looking for the cheapest flight from Seattle to Ireland? While on average our users pay C$ 1,188, our data indicates the cheapest price to be C$ 631. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 1,750.

  • 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 C$ 654). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,453). 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 airline flying from Seattle to Ireland

Discover the top airline 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 629,999 searches. Data last updated 26 July 2026.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapestC$ 689AverageC$ 1,012FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Seattle to Ireland?

When you search for this flight from Seattle to Ireland, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

Why should you use Cheapflights to find cheap flight tickets from Seattle to Ireland?

Cheapflights simply makes it quick and affordable to book flights from Seattle to Ireland by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Seattle to Ireland with no change fees?

Yes! Cheapflights helps users easily find flights from Seattle to Ireland with no change fees.

Can Cheapflights notify me if prices for flights from Seattle to Ireland become cheaper?

Yes! Start tracking prices for Seattle to Ireland flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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