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Cheap flights from Seattle to Ireland from C$ 349

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 18/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DUB
5 May — 12 May1
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 30 April 2025.

Round-trip from

C$ 836

One-way from

C$ 349

Popular in

June

Cheapest in

January

Average price

C$ 984

Good round-trip deal

C$ 883 or less

Good one-way deal

C$ 834 or less
Icelandair
  • Icelandair
  • 21/8-26/8
  • 2 total stops
  • 58h 55m total
  • Seattle to Ireland
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18/10
  • 18/10
  • 2 total stops
  • 31h 30m total
  • Seattle to Ireland
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Highest demand for flights based on searches. 23% potential increase in price (C$ 401 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 60 potential savings vs. average RT price).
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Average for round-trip flights in April 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 30 April 2025.

Thu 21/811:30 p.m.SEA - DUB
1 stop29h 45mIcelandair
Sun 31/812:15 p.m.DUB - SEA
1 stop31h 10mIcelandair
Deal found 29/4C$ 836
Fri 19/94:20 p.m.SEA - DUB
1 stop33h 05mScandinavian Airlines
Sat 4/1010:15 a.m.DUB - SEA
1 stop35h 45mScandinavian Airlines
Deal found 28/4C$ 837
Wed 20/87:05 a.m.SEA - DUB
3 stops19h 15mUnited Airlines
Thu 28/89:20 a.m.DUB - SEA
1 stop19h 21mUnited Airlines
Deal found 29/4C$ 839
Sun 7/912:40 a.m.SEA - DUB
1 stop23h 15mDelta
Wed 17/910:00 a.m.DUB - SEA
1 stop18h 32mDelta
Deal found 28/4C$ 869
Tue 1/710:00 a.m.SEA - DUB
1 stop13h 45mLufthansa
Thu 31/79:50 a.m.DUB - SEA
2 stops20h 26mLufthansa
Deal found 29/4C$ 897
Wed 12/118:00 a.m.SEA - DUB
1 stop12h 55mMultiple Airlines
Wed 26/114:30 p.m.DUB - SEA
Nonstop9h 45mMultiple Airlines
Deal found 28/4C$ 927
Tue 13/511:38 a.m.SEA - DUB
1 stop13h 22mJetBlue
Tue 27/511:30 a.m.DUB - SEA
1 stop17h 24mJetBlue
Deal found 28/4C$ 937
Mon 26/56:07 p.m.SEA - DUB
1 stop14h 33mKLM
Mon 2/65:20 p.m.DUB - SEA
1 stop26h 20mKLM
Deal found 28/4C$ 955
Sun 26/105:02 a.m.SEA - DUB
1 stop17h 13mAer Lingus
Sun 2/114:30 p.m.DUB - SEA
Nonstop9h 45mAer Lingus
Deal found 28/4C$ 988

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 30 April 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 21/8

11:30 p.m.-1:15 p.m.

1 stop29h 45m

Dublin

Sun 31/8

12:15 p.m.-11:25 a.m.

1 stop31h 10m

C$ 836

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Fri 19/9

4:20 p.m.-9:25 a.m.

1 stop33h 05m

Dublin

Sat 4/10

10:15 a.m.-2:00 p.m.

1 stop35h 45m

C$ 837

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 20/8

7:05 a.m.-10:20 a.m.

3 stops19h 15m

Dublin

Fri 29/8

9:20 a.m.-2:16 p.m.

1 stop12h 56m

C$ 839

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 7/9

12:40 a.m.-7:55 a.m.

1 stop23h 15m

Dublin

Wed 17/9

10:00 a.m.-8:32 p.m.

1 stop18h 32m

C$ 869

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 1/7

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

1 stop13h 45m

Dublin

Thu 31/7

9:50 a.m.-10:16 p.m.

2 stops20h 26m

C$ 897

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 13/5

11:38 a.m.-9:00 a.m.

1 stop13h 22m

Dublin

Tue 27/5

11:30 a.m.-8:54 p.m.

1 stop17h 24m

C$ 937

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Mon 26/5

6:07 p.m.-4:40 p.m.

1 stop14h 33m

Dublin

Mon 2/6

5:20 p.m.-11:40 a.m.

1 stop26h 20m

C$ 955

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Fri 25/7

12:20 a.m.-9:45 a.m.

1 stop25h 25m

Dublin

Mon 11/8

9:50 a.m.-11:10 a.m.

1 stop33h 20m

C$ 980

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 26/10

5:02 a.m.-5:15 a.m.

1 stop17h 13m

Dublin

Sun 2/11

4:30 p.m.-6:15 p.m.

Nonstop9h 45m

C$ 988

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 18/10

7:00 p.m.-10:30 a.m.

2 stops31h 30m

C$ 349

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/4

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 30 April 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. Friday 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 30 April 2025.

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

Rainfall in Ireland by month

Plan your trip to Ireland by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Ireland ranges from 49.0 - 79.0 mm per month. October is typically the wettest month, when rainfall can reach 79.0 mm. February is typically the driest time to visit Ireland when rainfall is around 49.0 mm.

Temperature in Ireland by month

Plan your trip to Ireland by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Ireland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

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 30 April 2025.
See what other customers who have flown with Alaska Airlines, Delta and KLM from Seattle to Ireland have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,936 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
KLM
7.8
Good
1,333 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
JetBlue
7.3
Good
2,922 reviews
Alaska Airlines
8.0
Very good
9,968 reviews
Check prices

Entertainment

7.1

Boarding

8.2

Overall

8.0

Crew

8.5

Food

7.1

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

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 28 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 WestJet (C$ 453), JetBlue (C$ 497), and Icelandair (C$ 538).

  • 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$ 898, our data indicates the cheapest price to be C$ 667. The most popular route (Seattle/Tacoma Intl - Dublin), is priced around C$ 879.

  • 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 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapestC$ 387AverageC$ 895FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapestC$ 570AverageC$ 934FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapestC$ 579AverageC$ 851FlexibilityNo cancel feeOn-time76%
Search Icelandair 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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