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Cheap flights from Seattle to Ireland from C$ 380

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 25/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
8 Jul — 15 Jul1
1 adult

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 3 July 2025.

Round-trip from

C$ 540

One-way from

C$ 380

Popular in

June

Cheapest in

January

Average price

C$ 1,148

Good round-trip deal

C$ 628 or less
Delta
  • Delta
  • 1/9-12/12
  • 3 total stops
  • 51h 29m total
  • Seattle to Ireland
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Lufthansa
  • Lufthansa
  • 25/9
  • 1 total stop
  • 13h 45m total
  • Seattle to Ireland
Search Deals
Highest demand for flights based on searches. 23% potential increase in price (C$ 373 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 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 3 July 2025.

Mon 1/95:40 p.m.SEA - DUB
1 stop30h 40mDelta
Fri 12/1210:45 a.m.DUB - SEA
2 stops20h 49mDelta
Deal found 3/7C$ 540
Mon 8/126:50 p.m.SEA - DUB
1 stop29h 05mBritish Airways
Mon 15/128:30 p.m.DUB - SEA
1 stop22h 50mBritish Airways
Deal found 3/7C$ 541
Mon 27/107:00 a.m.SEA - DUB
1 stop18h 10mUnited Airlines
Sun 9/119:00 a.m.DUB - SEA
1 stop20h 56mUnited Airlines
Deal found 2/7C$ 542
Mon 4/83:45 p.m.SEA - DUB
1 stop13h 30mIcelandair
Sat 16/82:15 p.m.DUB - SEA
1 stop11h 35mIcelandair
Deal found 2/7C$ 544
Mon 11/87:35 p.m.SEA - DUB
Nonstop9h 05mAer Lingus
Sun 17/84:10 p.m.DUB - SEA
Nonstop9h 40mAer Lingus
Deal found 2/7C$ 549
Sun 3/87:15 p.m.SEA - DUB
2 stops28h 30mLufthansa
Tue 12/89:20 a.m.DUB - SEA
2 stops41h 16mLufthansa
Deal found 1/7C$ 555

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 3 July 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

Mon 1/9

5:40 p.m.-8:20 a.m.

1 stop30h 40m

Dublin

Fri 12/12

10:45 a.m.-11:34 p.m.

2 stops20h 49m

C$ 540

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 8/12

6:50 p.m.-7:55 a.m.

1 stop29h 05m

Dublin

Mon 15/12

8:30 p.m.-11:20 a.m.

1 stop22h 50m

C$ 541

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 27/10

7:00 a.m.-8:10 a.m.

1 stop18h 10m

Dublin

Sun 9/11

9:00 a.m.-9:56 p.m.

1 stop20h 56m

C$ 542

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 4/8

3:45 p.m.-1:15 p.m.

1 stop13h 30m

Dublin

Tue 19/8

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

1 stop11h 35m

C$ 544

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 11/8

7:35 p.m.-12:40 p.m.

Nonstop9h 05m

Dublin

Sun 17/8

4:10 p.m.-5:50 p.m.

Nonstop9h 40m

C$ 549

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 3/8

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

2 stops28h 30m

Dublin

Tue 12/8

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

2 stops41h 16m

C$ 555

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 4/12

9:30 a.m.-7:45 a.m.

1 stop14h 15m

Dublin

Thu 11/12

9:45 a.m.-8:32 p.m.

1 stop18h 47m

C$ 564

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 25/9

10:00 a.m.-7:45 a.m.

1 stop13h 45m

C$ 380

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 25/9

3:45 p.m.-12:10 a.m.

3 stops24h 25m

C$ 384

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 28/8

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

3 stops28h 45m

C$ 387

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 17 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 3 July 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. Monday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Ireland

Explore weekly flight availability from Seattle to Ireland. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 3 July 2025.

The most flights from SEA to IE0 are scheduled on a Monday (3 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (2 on average).

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 3 July 2025.
Read through reviews of airlines operating flights from Seattle to Ireland, such as Alaska Airlines,Delta, andSWISS. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
Delta
8.0
Very good
7,970 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
SWISS
7.5
Good
1,654 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
United Airlines
7.4
Good
8,845 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews
Check prices

Entertainment

7.1

Comfort

7.8

Crew

8.5

Boarding

8.1

Food

7.1

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Surinder,May 2025

SEA - YYZ

My wife wanted the aile seat and I always prefer window seat. Luckily we both got the best seats we wanted. The plane was very nice and we enjoyed the best take off and the smooth landing at Toronto. All the services by the staff inside the aeroplane were very nice well appreciated. Thanks again and hope to see you soon.

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 25 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • 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 Lufthansa (C$ 380), United Airlines (C$ 387), and Aer Lingus (C$ 496).

  • 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 (73%), Aer Lingus (73%), British Airways( 73%).

  • 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$ 829, our data indicates the cheapest price to be C$ 628. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 688.

  • 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 3 airlines flying from Seattle to Ireland

Discover the top 3 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 3 July 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapestC$ 570AverageC$ 838FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapestC$ 594AverageC$ 1,421FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapestC$ 603AverageC$ 949FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

Fly with Cheapflights

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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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