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Cheap flights from Seattle to Ireland from C$ 509

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 12/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
27 Nov — 4 Dec1
1 adult
1 adult, Economy, 0 bags

Find 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 28 October 2025.

Wed 3/122:35 p.m.SEA - DUB
1 stop11h 40mIcelandair
Thu 11/1211:30 a.m.DUB - SEA
1 stop13h 30mIcelandair
Deal found 28/10C$ 566
Wed 3/122:35 p.m.SEA - DUB
1 stop11h 40mIcelandair
Wed 10/1211:30 a.m.DUB - SEA
1 stop13h 30mIcelandair
Deal found 28/10C$ 600
Tue 2/126:00 a.m.SEA - DUB
1 stop17h 45mDelta
Wed 10/1210:45 a.m.DUB - SEA
2 stops31h 34mDelta
Deal found 28/10C$ 613
Sun 9/112:35 p.m.SEA - DUB
1 stop11h 40mIcelandair
Thu 13/1111:30 a.m.DUB - SEA
1 stop13h 30mIcelandair
Deal found 26/10C$ 618
Mon 1/1211:55 p.m.SEA - DUB
1 stop23h 50mDelta
Fri 12/1210:45 a.m.DUB - SEA
2 stops31h 34mDelta
Deal found 28/10C$ 620
Tue 11/119:28 a.m.SEA - DUB
1 stop14h 17mDelta
Wed 19/118:45 a.m.DUB - SEA
2 stops21h 40mDelta
Deal found 27/10C$ 632
Wed 3/122:05 p.m.SEA - DUB
1 stop17h 40mDelta
Fri 12/1210:45 a.m.DUB - SEA
2 stops31h 34mDelta
Deal found 28/10C$ 634
Wed 12/1111:27 a.m.SEA - DUB
1 stop13h 18mKLM
Wed 26/115:55 a.m.DUB - SEA
2 stops18h 27mKLM
Deal found 28/10C$ 635
Mon 3/113:00 p.m.SEA - DUB
1 stop17h 20mDelta
Wed 19/1110:45 a.m.DUB - SEA
2 stops34h 11mDelta
Deal found 26/10C$ 639
Wed 3/122:05 p.m.SEA - DUB
1 stop17h 40mDelta
Mon 8/128:50 a.m.DUB - SEA
1 stop35h 00mDelta
Deal found 28/10C$ 642
Mon 24/116:14 a.m.SEA - DUB
2 stops17h 56mUnited Airlines
Wed 3/129:00 a.m.DUB - SEA
2 stops41h 25mUnited Airlines
Deal found 28/10C$ 643
Tue 11/118:00 a.m.SEA - DUB
2 stops39h 30mMultiple Airlines
Wed 19/119:00 a.m.DUB - SEA
2 stops32h 31mMultiple Airlines
Deal found 27/10C$ 645

Cheap flight deals from Seattle to Ireland

Keep the following information in mind while searching for Seattle to Ireland flight deals. Data was last updated 28 October 2025.

Round-trip from

C$ 565

One-way from

C$ 509

Popular in

June

Cheapest in

January

Average price

C$ 866
Icelandair
  • Icelandair
  • 24/2-2/3
  • 2 total stops
  • 25h 10m total
  • Seattle to Ireland
Search Deals
12/12
  • 12/12
  • 3 total stops
  • 45h 10m total
  • Seattle to Ireland
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 367 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 58 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 28 October 2025.
Use the filters below to find and compare flights from Seattle to Ireland that are best for you.

Fly from

Seattle

Fly to

Ireland

Route

Depart

Return

Price

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 26/2

2:35 p.m.-10:15 a.m.

1 stop11h 40m

Dublin

Sun 1/3

11:30 a.m.-5:00 p.m.

1 stop13h 30m

C$ 565

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 24/2

2:35 p.m.-10:15 a.m.

1 stop11h 40m

Dublin

Mon 2/3

11:30 a.m.-5:00 p.m.

1 stop13h 30m

C$ 565

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Fri 27/3

3:35 p.m.-12:15 p.m.

1 stop13h 40m

Dublin

Tue 31/3

2:15 p.m.-5:50 p.m.

1 stop11h 35m

C$ 571

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 24/3

3:35 p.m.-10:15 a.m.

1 stop11h 40m

Dublin

Wed 1/4

12:15 p.m.-5:50 p.m.

1 stop13h 35m

C$ 571

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 25/2

8:45 a.m.-7:45 a.m.

1 stop15h 00m

Dublin

Fri 6/3

6:00 a.m.-8:31 p.m.

2 stops22h 31m

C$ 632

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 11/11

9:28 a.m.-7:45 a.m.

1 stop14h 17m

Dublin

Wed 19/11

8:45 a.m.-10:25 p.m.

2 stops21h 40m

C$ 632

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 3/3

6:05 a.m.-7:45 a.m.

1 stop17h 40m

Dublin

Tue 10/3

6:00 a.m.-7:25 p.m.

2 stops20h 25m

C$ 632

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 3/12

2:05 p.m.-3:45 p.m.

1 stop17h 40m

Dublin

Tue 9/12

10:45 a.m.-11:58 p.m.

2 stops21h 13m

C$ 634

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 3/3

7:20 a.m.-9:20 a.m.

1 stop18h 00m

Dublin

Tue 17/3

5:55 a.m.-10:25 p.m.

2 stops23h 30m

C$ 638

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 4/3

6:00 a.m.-7:45 a.m.

1 stop17h 45m

Dublin

Fri 13/3

5:55 a.m.-10:25 p.m.

2 stops23h 30m

C$ 638

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/10

Showing 1-10 of 21 results
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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, November is the cheapest month in which you can book a flight from Seattle to Ireland (average of C$ 446). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 952). 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 28 October 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Ireland in the morning. If you’re flexible enough to do this you can expect to save up to 57% on your trip compared to booking a flight in the evening.

What is the cheapest day to fly from Seattle to Ireland?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Ireland. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their Seattle to Ireland flight should consider departing on Sunday mornings when fares are most often at their lowest. Thursday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 28 October 2025.
Read through reviews of airlines operating flights from Seattle to Ireland, such as Aer Lingus and Icelandair. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Aer Lingus
7.2
Good
1,361 reviews
Check prices

Boarding

7.4

Comfort

7.1

Crew

8.0

Entertainment

6.9

Overall

7.2

Food

6.6

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
Aer Lingus
7.2
Good
1,361 reviews
Aer Lingus
7.2
Good
1,361 reviews
Check prices

Boarding

7.4

Comfort

7.1

Crew

8.0

Entertainment

6.9

Overall

7.2

Food

6.6

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.
Icelandair
7.1
Good
562 reviews
Aer Lingus
7.2
Good
1,361 reviews
Check prices

Boarding

7.4

Comfort

7.1

Crew

8.0

Entertainment

6.9

Overall

7.2

Food

6.6

Reviews

1 / 20
6.0
Good

David,Oct 2025

LIS - DUB

Two issues... 1. The Aer Lingus check-in counter in Lisbon did not open until 90 minutes prior to the flight. Huge line of customers waiting to check-in and very time consuming. Plus, having to clear security, passport control, and take the shuttle bus to the plane takes a long time. Consequently, the flight was delayed due to passengers not being able to get to the gate on time. I showed up four hours early but had to wait for over two hours just for the check-in counter to open. Many passengers complaining about the same issue. VERY STRESSFUL! 2. During the flight one of the flight attendants (Glen) was quite rude to a parent of a non-verbal autistic child. At one point I heard him say in a nasty tone, "You have three seconds to put your bag under the seat or I will take it and check it. 3, 2, 1!" I did not speak to the flight attendant because I was afraid he would kick me off the flight. Very unpleasant to everyone before take off also while instructing them to put the seats up and bags under. A little interpersonal communication training could help this man. Other than those two issues, the flight was fine.

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 26 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$ 565, 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 (70%), Aer Lingus (70%), British Airways( 70%).

  • 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, November is the cheapest month in which you can book a flight from Seattle to Ireland (average of C$ 446). Flying from Seattle to Ireland in June is currently the most expensive (average of C$ 952). 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

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Top 2 airlines flying from Seattle to Ireland

Discover the top 2 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 629,999 searches. Data last updated 28 October 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 585AverageC$ 860FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapestC$ 645AverageC$ 1,000FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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

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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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