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Cheap flights from Seattle to Ireland from C$ 376

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 30/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
17 Oct — 24 Oct1
1 adult
1 adult, Economy

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 17 September 2025.

Round-trip from

C$ 559

One-way from

C$ 376

Popular in

June

Cheapest in

January

Average price

C$ 854

Good round-trip deal

C$ 1,347 or less
Icelandair
  • Icelandair
  • 22/10-31/10
  • 2 total stops
  • 27h 00m total
  • Seattle to Ireland
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30/9
  • 30/9
  • 2 total stops
  • 34h 15m total
  • Seattle to Ireland
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 372 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 56 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Ireland.
Search Deals

Find flight deals from Seattle to Ireland

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 17 September 2025.

Mon 27/106:20 a.m.SEA - DUB
1 stop20h 35mMultiple Airlines
Wed 12/119:00 a.m.DUB - SEA
1 stop21h 16mMultiple Airlines
Deal found 16/9C$ 559
Tue 2/128:10 a.m.SEA - DUB
1 stop15h 00mUnited Airlines
Wed 10/129:00 a.m.DUB - SEA
2 stops23h 59mUnited Airlines
Deal found 17/9C$ 563
Mon 27/106:20 a.m.SEA - DUB
1 stop18h 10mUnited Airlines
Wed 12/119:00 a.m.DUB - SEA
2 stops21h 45mUnited Airlines
Deal found 17/9C$ 567
Mon 20/1012:00 p.m.SEA - DUB
1 stop15h 10mUnited Airlines
Wed 5/111:35 p.m.DUB - SEA
1 stop17h 06mUnited Airlines
Deal found 16/9C$ 581
Wed 3/128:10 a.m.SEA - DUB
1 stop18h 10mUnited Airlines
Thu 11/1212:05 p.m.DUB - SEA
1 stop16h 49mUnited Airlines
Deal found 17/9C$ 582
Tue 11/119:04 a.m.SEA - DUB
2 stops16h 51mUnited Airlines
Tue 18/1110:40 a.m.DUB - SEA
2 stops18h 11mUnited Airlines
Deal found 17/9C$ 587
Sat 22/113:46 p.m.SEA - DUB
1 stop32h 59mDelta
Thu 4/1210:45 a.m.DUB - SEA
1 stop19h 36mDelta
Deal found 16/9C$ 589
Sat 22/1110:05 p.m.SEA - DUB
1 stop27h 15mDelta
Fri 5/1211:30 a.m.DUB - SEA
1 stop18h 47mDelta
Deal found 17/9C$ 590
Sat 11/101:12 p.m.SEA - DUB
1 stop33h 58mUnited Airlines
Fri 24/109:20 a.m.DUB - SEA
1 stop32h 01mUnited Airlines
Deal found 17/9C$ 592
Sun 7/126:00 a.m.SEA - DUB
2 stops19h 20mDelta
Tue 14/411:00 a.m.DUB - SEA
1 stop21h 06mDelta
Deal found 16/9C$ 593
Tue 30/93:45 p.m.SEA - DUB
1 stop11h 20mIcelandair
Fri 10/1012:15 p.m.DUB - SEA
1 stop16h 25mIcelandair
Deal found 16/9C$ 597

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 17 September 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

Tue 18/11

8:36 a.m.-9:55 a.m.

2 stops17h 19m

Dublin

Fri 5/12

1:35 p.m.-10:38 p.m.

1 stop17h 03m

C$ 582

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 8/3

5:15 a.m.-6:10 a.m.

2 stops17h 55m

Dublin

Wed 25/3

12:05 p.m.-8:10 p.m.

1 stop15h 05m

C$ 583

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 13/1

10:58 a.m.-8:10 a.m.

1 stop13h 12m

Dublin

Tue 27/1

10:40 a.m.-9:15 p.m.

2 stops18h 35m

C$ 587

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 11/11

9:04 a.m.-9:55 a.m.

2 stops16h 51m

Dublin

Tue 18/11

1:35 p.m.-10:41 p.m.

1 stop17h 06m

C$ 587

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 24/2

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

3 stops18h 23m

Dublin

Tue 3/3

9:30 a.m.-7:03 p.m.

2 stops17h 33m

C$ 587

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 20/1

1:40 p.m.-3:45 p.m.

1 stop18h 05m

Dublin

Fri 30/1

10:45 a.m.-10:29 a.m.

2 stops31h 44m

C$ 608

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 18/1

11:05 p.m.-8:45 a.m.

2 stops25h 40m

Dublin

Mon 26/1

1:25 p.m.-11:50 a.m.

1 stop30h 25m

C$ 609

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 15/10

7:00 a.m.-10:20 a.m.

2 stops19h 20m

Dublin

Wed 22/10

9:20 a.m.-6:36 p.m.

1 stop17h 16m

C$ 612

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 29/10

1:40 p.m.-4:20 p.m.

2 stops19h 40m

Dublin

Tue 4/11

10:45 a.m.-8:16 p.m.

1 stop17h 31m

C$ 625

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 24/11

7:15 a.m.-7:45 a.m.

1 stop16h 30m

Dublin

Thu 16/4

10:00 a.m.-8:24 p.m.

1 stop18h 24m

C$ 630

Flights are sorted by cheapest round-trip flights first.

Deals found on 17/9

Showing 1-10 of 19 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, January is the cheapest month in which you can book a flight from Seattle to Ireland (average of C$ 458). Flying from Seattle to Ireland in December is currently the most expensive (average of C$ 760). 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 17 September 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Ireland at noon. If you’re flexible enough to do this you can expect to save up to 15% on your trip compared to booking a flight in the morning.

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 Monday evenings 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 17 September 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
1,277 reviews
Check prices

Crew

8.0

Food

6.5

Boarding

7.3

Comfort

7.1

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Aer Lingus
7.2
Good
1,277 reviews
Aer Lingus
7.2
Good
1,277 reviews
Check prices

Crew

8.0

Food

6.5

Boarding

7.3

Comfort

7.1

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.
Icelandair
7.0
Good
545 reviews
Aer Lingus
7.2
Good
1,277 reviews
Check prices

Crew

8.0

Food

6.5

Boarding

7.3

Comfort

7.1

Entertainment

6.9

Overall

7.2

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

LHR - DUB

The lack of headphones impacted our ability to enjoy the entertainment system provided. The fact that my last connection was associated with an "affiliated airline" that did not allow me to retrieve a check in or a boarding pass via the app almost posed a significant issue as the last leg of the flight was overbooked and we were stressed about getting a seat as a result.

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 32 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$ 582, United Airlines can have you in Ireland from Seattle in 17h 19m. Seattle and Ireland are separated by a distance of 7279 km.

  • 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 (82%), Aer Lingus (82%), British Airways( 82%).

  • 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$ 1,349, our data indicates the cheapest price to be C$ 740. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 841.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Ireland (average of C$ 458). Flying from Seattle to Ireland in December is currently the most expensive (average of C$ 760). 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 550AverageC$ 827FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapestC$ 634AverageC$ 944FlexibilityNo 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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