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Cheap flights from Seattle to Ireland from C$ 447

SEA — DUB
21 Nov — 28 Nov1
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

Mon 30/112:35 p.m. -
1 stop11h 40m
Fri 11/1211:30 a.m. -
1 stop13h 30m
Deal found 21/10C$ 960
Fri 4/122:35 p.m. -
1 stop11h 40m
Wed 9/1211:30 a.m. -
1 stop13h 30m
Deal found 21/10C$ 1,030
Sun 13/126:45 p.m. -
1 stop12h 10m
Mon 21/128:40 p.m. -
1 stop22h 45m
Deal found 17/10C$ 1,061
Wed 18/116:30 a.m. -
1 stop19h 25m
Thu 26/119:00 a.m. -
2 stops38h 32m
Deal found 21/10C$ 1,068
Tue 1/122:05 p.m. -
1 stop34h 05m
Thu 10/129:00 a.m. -
2 stops36h 22m
Deal found 21/10C$ 1,070
Tue 1/126:45 p.m. -
1 stop14h 10m
Mon 7/121:00 p.m. -
1 stop30h 25m
Deal found 21/10C$ 1,071
Wed 2/125:05 a.m. -
2 stops18h 25m
Wed 9/125:10 a.m. -
1 stop14h 50m
Deal found 19/10C$ 1,075
Wed 2/129:18 a.m. -
2 stops15h 27m
Tue 8/125:45 a.m. -
1 stop14h 05m
Deal found 21/10C$ 1,078
Mon 30/1110:56 p.m. -
2 stops27h 24m
Thu 10/129:00 a.m. -
2 stops36h 22m
Deal found 21/10C$ 1,084
Mon 30/1110:52 p.m. -
2 stops26h 53m
Wed 9/125:45 a.m. -
1 stop14h 05m
Deal found 20/10C$ 1,085

Find flight deals from Seattle to Ireland

Round-trip from

C$ 943

One-way from

C$ 447

Popular in

June

Cheapest in

February

Average price

C$ 1,185

Good one-way deal

C$ 582 or less
Icelandair
  • Icelandair
  • 7/2-16/2
  • 2 total stops
  • 25h 10m total
  • Seattle to Ireland
Search Deals
British Airways
  • British Airways
  • 17/3-31/12
  • 1 total stop
  • 14h 15m total
  • Seattle to Ireland
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 291 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 64 potential savings vs. average RT price).
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Average for round-trip flights in October 2026
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Ireland.
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Cheapflights Fare Finder

 
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 Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Mon 15/3

2:42 p.m.-9:55 a.m.

3 stops36h 13m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 471

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sun 14/3

2:42 p.m.-9:55 a.m.

3 stops36h 13m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 516

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sat 13/3

2:42 p.m.-7:30 a.m.

3 stops32h 48m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 516

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Thu 1/4

5:07 a.m.-7:20 a.m.

2 stops18h 13m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 533

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 13/1

6:45 p.m.-7:40 p.m.

1 stop16h 55m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 648
Quickest round-trip

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 28/10

8:30 a.m.-8:10 a.m.

2 stops16h 40m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 670

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sat 2/1

11:15 p.m.-9:45 a.m.

1 stop26h 30m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 686

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Thu 29/10

8:30 a.m.-10:20 a.m.

3 stops18h 50m

Dublin

Wed 31/12

12:00 a.m.-3:00 p.m.

Nonstop0h 00m

C$ 734

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 7/4

8:30 a.m.-11:10 a.m.

2 stops18h 40m

Dublin

Wed 21/4

9:20 a.m.-6:23 p.m.

1 stop17h 03m

C$ 977

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 10/2

6:05 a.m.-8:45 a.m.

2 stops18h 40m

Dublin

Thu 18/2

1:25 p.m.-11:47 a.m.

1 stop30h 22m

C$ 991

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/10

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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

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$ 683). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,585). 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?

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 12 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

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
1,851 reviews
Check prices

Food

6.7

Comfort

7.2

Crew

8.1

Overall

7.3

Boarding

7.5

Entertainment

7.1

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
1,851 reviews
Aer Lingus
7.3
Good
1,851 reviews
Check prices

Food

6.7

Comfort

7.2

Crew

8.1

Overall

7.3

Boarding

7.5

Entertainment

7.1

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

  • 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 47 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$ 977, United Airlines can have you in Ireland from Seattle in 18h 40m. 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 (77%), Aer Lingus (77%), Iberia( 77%).

  • 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$ 582, our data indicates the cheapest price to be C$ 577. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 1,528.

  • 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$ 683). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,585). 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

Top airline flying from Seattle to Ireland

AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapestC$ 687AverageC$ 1,086FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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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.

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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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