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Cheap flights from Seattle to Ireland from C$ 338

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 11/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
11 Oct — 18 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 11 September 2025.

Round-trip from

C$ 560

One-way from

C$ 338

Popular in

June

Cheapest in

January

Average price

C$ 890

Good round-trip deal

C$ 1,357 or less

Good one-way deal

C$ 568 or less
Icelandair
  • Icelandair
  • 13/12-17/4
  • 2 total stops
  • 25h 15m total
  • Seattle to Ireland
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WestJet
  • WestJet
  • 7/10
  • 1 total stop
  • 19h 45m total
  • Seattle to Ireland
Search Deals
Highest demand for flights based on searches. 22% potential increase in price (C$ 375 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 57 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.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Ireland.
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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 11 September 2025.

Sat 13/122:35 p.m.SEA - DUB
1 stop11h 40mIcelandair
Fri 17/412:15 p.m.DUB - SEA
1 stop13h 35mIcelandair
Deal found 11/9C$ 560
Tue 11/117:00 a.m.SEA - DUB
1 stop17h 10mUnited Airlines
Wed 19/119:00 a.m.DUB - SEA
2 stops23h 59mUnited Airlines
Deal found 10/9C$ 564
Tue 28/108:15 a.m.SEA - DUB
1 stop14h 55mUnited Airlines
Fri 14/119:00 a.m.DUB - SEA
2 stops23h 59mUnited Airlines
Deal found 9/9C$ 567
Wed 19/119:04 a.m.SEA - DUB
2 stops16h 51mUnited Airlines
Wed 26/119:00 a.m.DUB - SEA
1 stop21h 16mUnited Airlines
Deal found 11/9C$ 571
Mon 20/107:19 a.m.SEA - DUB
1 stop17h 56mDelta
Wed 5/1110:45 a.m.DUB - SEA
2 stops31h 48mDelta
Deal found 11/9C$ 572
Mon 1/122:35 p.m.SEA - DUB
1 stop11h 40mIcelandair
Sat 13/1211:30 a.m.DUB - SEA
1 stop13h 30mIcelandair
Deal found 11/9C$ 578
Wed 3/128:10 a.m.SEA - DUB
1 stop18h 10mUnited Airlines
Wed 10/1212:05 p.m.DUB - SEA
1 stop16h 49mUnited Airlines
Deal found 10/9C$ 585
Wed 29/109:04 a.m.SEA - DUB
2 stops17h 51mUnited Airlines
Wed 12/1112:05 p.m.DUB - SEA
2 stops20h 54mUnited Airlines
Deal found 11/9C$ 592
Sat 1/1110:05 p.m.SEA - DUB
1 stop28h 15mDelta
Wed 12/1111:30 a.m.DUB - SEA
1 stop18h 55mDelta
Deal found 9/9C$ 594
Sat 11/104:47 p.m.SEA - DUB
1 stop32h 58mUnited Airlines
Fri 24/109:20 a.m.DUB - SEA
1 stop32h 01mUnited Airlines
Deal found 11/9C$ 596
Sun 23/117:30 a.m.SEA - DUB
1 stop17h 50mDelta
Tue 14/43:00 p.m.DUB - SEA
2 stops29h 16mDelta
Deal found 11/9C$ 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 11 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

Sat 13/12

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

1 stop11h 40m

Dublin

Tue 14/4

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

1 stop11h 35m

C$ 560

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 7/12

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

1 stop11h 40m

Dublin

Thu 11/12

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

1 stop13h 30m

C$ 560

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 26/1

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

1 stop13h 12m

Dublin

Thu 5/2

10:40 a.m.-10:43 p.m.

1 stop20h 03m

C$ 585

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 24/1

2:10 p.m.-8:10 a.m.

1 stop34h 00m

Dublin

Wed 11/2

10:40 a.m.-10:43 p.m.

1 stop20h 03m

C$ 594

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

9:30 a.m.-10:59 p.m.

2 stops20h 29m

C$ 594

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 25/11

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

1 stop14h 17m

Dublin

Tue 14/4

3:00 p.m.-12:16 p.m.

2 stops29h 16m

C$ 597

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 26/1

12:40 p.m.-8:10 a.m.

2 stops35h 30m

Dublin

Wed 11/2

10:40 a.m.-10:43 p.m.

1 stop20h 03m

C$ 601

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 27/10

8:00 a.m.-10:20 a.m.

1 stop19h 20m

Dublin

Wed 12/11

9:00 a.m.-10:16 p.m.

1 stop21h 16m

C$ 607

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 29/10

7:00 a.m.-9:55 a.m.

2 stops19h 55m

Dublin

Fri 14/11

9:00 a.m.-10:16 p.m.

1 stop21h 16m

C$ 614

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 15/10

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

2 stops16h 10m

Dublin

Wed 22/10

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

1 stop17h 16m

C$ 617

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/9

Showing 1-10 of 20 results
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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
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 11 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 19% 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 11 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
1,271 reviews
Check prices

Boarding

7.3

Overall

7.2

Entertainment

6.9

Food

6.5

Crew

8.0

Comfort

7.1

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
1,271 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Boarding

7.3

Overall

7.2

Entertainment

6.9

Food

6.5

Crew

8.0

Comfort

7.1

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
546 reviews
Aer Lingus
7.2
Good
1,271 reviews
Check prices

Boarding

7.3

Overall

7.2

Entertainment

6.9

Food

6.5

Crew

8.0

Comfort

7.1

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$ 560, 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 cheapest airlines to fly from Seattle to Ireland one-way?

    The cheapest airlines for a one-way flight from Seattle to Ireland are WestJet (C$ 338), Icelandair (C$ 534), and United Airlines (C$ 553).

  • 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 (78%), Aer Lingus (78%), British Airways( 78%).

  • 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$ 1,085, our data indicates the cheapest price to be C$ 567. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 847.

  • 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 11 September 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 554AverageC$ 834FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapestC$ 639AverageC$ 951FlexibilityNo 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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