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Cheap flights from Seattle to Ireland from C$ 454

SEA — DUB
10 Oct — 17 Oct1
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 16/912:05 p.m. -
1 stop15h 40m
Tue 22/93:25 p.m. -
Nonstop9h 45m
Deal found 9/9C$ 971
Fri 16/107:30 a.m. -
1 stop18h 15m
Mon 26/109:45 a.m. -
2 stops21h 51m
Deal found 9/9C$ 979
Wed 9/127:00 a.m. -
1 stop17h 10m
Thu 17/121:35 p.m. -
2 stops17h 41m
Deal found 8/9C$ 980
Sat 12/123:48 p.m. -
1 stop32h 57m
Tue 22/126:00 a.m. -
1 stop15h 50m
Deal found 8/9C$ 982
Fri 16/1011:14 p.m. -
2 stops24h 16m
Mon 26/1012:05 p.m. -
2 stops28h 42m
Deal found 10/9C$ 986
Wed 9/127:15 a.m. -
2 stops17h 30m
Mon 21/129:55 a.m. -
1 stop35h 55m
Deal found 8/9C$ 990
Thu 1/106:00 a.m. -
1 stop19h 15m
Sat 10/108:55 a.m. -
2 stops21h 10m
Deal found 9/9C$ 994
Fri 18/911:08 p.m. -
1 stop27h 37m
Sun 27/95:55 a.m. -
1 stop13h 52m
Deal found 9/9C$ 995
Sat 12/1211:37 p.m. -
1 stop24h 18m
Mon 21/129:55 a.m. -
1 stop35h 55m
Deal found 8/9C$ 1,000
Sat 26/93:40 p.m. -
1 stop11h 25m
Wed 7/1012:15 p.m. -
1 stop13h 40m
Deal found 8/9C$ 1,008
Fri 25/97:00 p.m. -
1 stop32h 05m
Tue 6/102:15 p.m. -
1 stop11h 40m
Deal found 8/9C$ 1,009

Find flight deals from Seattle to Ireland

Round-trip from

C$ 965

One-way from

C$ 454

Popular in

June

Cheapest in

February

Average price

C$ 1,208

Good one-way deal

C$ 408 or less
11/1-19/1
  • 11/1-19/1
  • 4 total stops
  • 73h 17m total
  • Seattle to Ireland
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United Airlines
  • United Airlines
  • 13/1-31/12
  • 2 total stops
  • 15h 40m total
  • Seattle to Ireland
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Highest demand for flights based on searches. 18% potential increase in price (C$ 313 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 63 potential savings vs. average RT price).
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Average for round-trip flights in September 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 22/2

7:03 a.m.-7:30 a.m.

2 stops16h 27m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 454

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Tue 29/9

6:30 a.m.-11:10 a.m.

2 stops20h 40m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 651

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Sat 10/10

11:14 p.m.-7:30 a.m.

2 stops24h 16m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 651

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Mon 12/10

8:25 a.m.-11:10 a.m.

2 stops18h 45m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 651
Quickest round-trip

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Fri 18/9

10:50 a.m.-7:45 a.m.

1 stop12h 55m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 714

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Thu 29/10

11:59 p.m.-7:30 a.m.

2 stops24h 31m

Dublin

Wed 31/12

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

Nonstop0h 00m

C$ 720

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Thu 8/10

6:00 a.m.-7:55 a.m.

1 stop17h 55m

Dublin

Mon 12/10

5:55 a.m.-4:45 p.m.

2 stops18h 50m

C$ 995

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 11/11

6:00 a.m.-8:45 a.m.

2 stops18h 45m

Dublin

Mon 16/11

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

1 stop30h 22m

C$ 1,059

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 11/11

6:00 a.m.-8:45 a.m.

2 stops18h 45m

Dublin

Tue 17/11

5:45 a.m.-11:47 a.m.

1 stop14h 02m

C$ 1,059

SeattleDublin

SEA Seattle/Tacoma Intl - DUB Dublin

SEADUB

Seattle/Tacoma Intl

Wed 14/10

11:05 a.m.-12:40 p.m.

2 stops17h 35m

Dublin

Fri 13/11

5:45 a.m.-11:47 a.m.

1 stop14h 02m

C$ 1,064

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/9

Showing 1-10 of 17 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$ 645). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,533). 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 46 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
1,755 reviews
Check prices

Boarding

7.5

Entertainment

7.0

Overall

7.3

Comfort

7.2

Crew

8.1

Food

6.7

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
1,755 reviews
Aer Lingus
7.3
Good
1,755 reviews
Check prices

Boarding

7.5

Entertainment

7.0

Overall

7.3

Comfort

7.2

Crew

8.1

Food

6.7

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 46 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$ 995, Delta can have you in Ireland from Seattle in 17h 55m. 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 (83%), Aer Lingus (83%), Iberia( 83%).

  • 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$ 568, our data indicates the cheapest price to be C$ 408. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 1,126.

  • 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$ 645). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 1,533). 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$ 674AverageC$ 1,065FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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