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Cheap flights from Seattle to Ireland from C$ 429

SEA — DUB
5 Dec — 12 Dec1
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

Wed 25/112:35 p.m. -
1 stop11h 40m
Wed 2/1211:30 a.m. -
1 stop13h 30m
Deal found 2/11C$ 947
Sun 29/112:35 p.m. -
1 stop11h 40m
Sun 6/1211:30 a.m. -
1 stop13h 30m
Deal found 2/11C$ 996
Wed 25/112:35 p.m. -
1 stop11h 40m
Sun 6/1211:30 a.m. -
1 stop13h 30m
Deal found 2/11C$ 1,017
Sun 15/112:35 p.m. -
1 stop11h 40m
Sat 12/1211:30 a.m. -
1 stop13h 30m
Deal found 4/11C$ 1,042
Wed 2/127:00 a.m. -
1 stop16h 30m
Tue 15/129:00 a.m. -
2 stops34h 44m
Deal found 4/11C$ 1,061
Mon 30/112:30 p.m. -
1 stop33h 40m
Thu 10/129:00 a.m. -
2 stops36h 22m
Deal found 2/11C$ 1,063
Sat 5/1211:25 p.m. -
1 stop24h 05m
Tue 15/129:00 a.m. -
2 stops36h 22m
Deal found 4/11C$ 1,064
Fri 27/112:35 p.m. -
1 stop11h 40m
Sat 5/1211:30 a.m. -
1 stop13h 30m
Deal found 4/11C$ 1,065
Wed 2/126:45 p.m. -
1 stop16h 55m
Tue 15/128:50 a.m. -
1 stop16h 00m
Deal found 4/11C$ 1,078
Wed 2/127:00 a.m. -
1 stop17h 10m
Thu 10/129:00 a.m. -
2 stops36h 22m
Deal found 2/11C$ 1,079
Wed 2/125:05 a.m. -
2 stops18h 25m
Wed 9/125:10 a.m. -
1 stop14h 50m
Deal found 2/11C$ 1,082

Find flight deals from Seattle to Ireland

Round-trip from

C$ 881

One-way from

C$ 429

Popular in

June

Cheapest in

February

Average price

C$ 968

Good one-way deal

C$ 578 or less
Icelandair
  • Icelandair
  • 12/1-19/1
  • 2 total stops
  • 25h 10m total
  • Seattle to Ireland
Search Deals
1/2-31/12
  • 1/2-31/12
  • 2 total stops
  • 38h 10m total
  • Seattle to Ireland
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (C$ 275 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 60 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2026
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Ireland.
Search Deals

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 1/2

2:35 p.m.-12:45 p.m.

2 stops38h 10m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 429

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sun 25/4

8:20 p.m.-7:35 p.m.

1 stop15h 15m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 452
Quickest round-trip

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Mon 26/4

1:35 p.m.-12:00 p.m.

1 stop14h 25m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 452

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Mon 7/12

2:35 p.m.-8:35 a.m.

3 stops34h 00m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 462

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Tue 23/3

5:07 a.m.-7:30 a.m.

3 stops19h 23m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 466

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sun 25/4

7:32 p.m.-7:30 a.m.

3 stops27h 58m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 475

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sat 24/4

5:07 a.m.-7:30 a.m.

3 stops18h 23m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 536

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 28/4

7:32 p.m.-7:30 a.m.

3 stops27h 58m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 619

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 9/12

6:15 a.m.-9:55 a.m.

3 stops19h 40m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 666

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sun 6/12

10:48 a.m.-9:55 a.m.

2 stops15h 07m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 666

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 22 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

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$ 723). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,575). 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.

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
1,878 reviews
Check prices

Food

6.7

Comfort

7.2

Entertainment

7.0

Boarding

7.5

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
1,878 reviews
Aer Lingus
7.3
Good
1,878 reviews
Check prices

Food

6.7

Comfort

7.2

Entertainment

7.0

Boarding

7.5

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

  • 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$ 926, Icelandair can have you in Ireland from Seattle in 11h 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 (76%), Aer Lingus (76%), Iberia( 76%).

  • 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$ 578, our data indicates the cheapest price to be C$ 573. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 1,567.

  • 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$ 723). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,575). 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$ 683AverageC$ 1,079FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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