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$321+ Cheap flights from Ireland to Seattle (SEA)

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 9/15. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Ireland to Seattle

Keep the following information in mind while searching for Ireland to Seattle flight deals. Data was last updated June 12, 2025.

Round-trip from

$510
(lastminute.com)

One-way from

$342
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$863

Good round-trip deal

$699 or less

Good one-way deal

$581 or less
From Ireland to Seattle/Tacoma Intl
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One-way flight from Ireland to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 20% potential increase in price ($188 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Price to beat on a round-trip flight from Ireland to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Ireland to Seattle/Tacoma Intl.
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Find flight deals from Ireland to Seattle

Cheapest flights from Ireland to Seattle
Explore the most affordable flight options available from Ireland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This SmartFares deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/257:05 pmDUB - SEA
1 stop26h 55mScandinavian Airlines
Sun 10/124:20 pmSEA - DUB
1 stop17h 55mScandinavian Airlines
Deal found 6/12$408
This SmartFares deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1012:15 pmDUB - SEA
1 stop16h 25mIcelandair
Wed 10/13:45 pmSEA - DUB
1 stop13h 30mIcelandair
Deal found 6/11$586
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/72:05 pmDUB - SEA
1 stop27h 31mAmerican Airlines
Mon 11/1011:45 amSEA - DUB
2 stops23h 50mAmerican Airlines
Deal found 6/11$587
This Bravofly deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/194:10 pmDUB - SEA
Nonstop9h 40mAer Lingus
Fri 7/47:35 pmSEA - DUB
Nonstop9h 00mAer Lingus
Deal found 6/10$667
This British Airways deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/1810:55 amDUB - SEA
1 stop15h 25mBritish Airways
Mon 6/301:30 pmSEA - DUB
1 stop12h 10mBritish Airways
Deal found 6/10$672
This KLM deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/98:55 amDUB - SEA
1 stop15h 10mKLM
Thu 9/187:20 amSEA - DUB
1 stop17h 55mKLM
Deal found 6/10$673
This Delta deal was found by Cheapflights users on 6/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/75:55 amDUB - SEA
2 stops16h 50mDelta
Mon 11/102:00 pmSEA - DUB
1 stop17h 40mDelta
Deal found 6/12$674
This Iberia deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1912:45 pmDUB - SEA
1 stop13h 35mMultiple Airlines
Wed 6/253:10 pmSEA - DUB
1 stop12h 30mMultiple Airlines
Deal found 6/10$688
This Iberia deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/411:45 amDUB - SEA
1 stop20h 58mIberia
Wed 9/103:00 pmSEA - DUB
1 stop12h 40mIberia
Deal found 6/11$759
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/262:40 pmSNN - SEA
2 stops31h 29mAmerican Airlines
Mon 6/3010:41 pmSEA - SNN
2 stops33h 29mAmerican Airlines
Deal found 6/11$885
This Air France deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/261:05 pmSNN - SEA
2 stops18h 48mAir France
Mon 6/308:10 pmSEA - SNN
2 stops31h 00mAir France
Deal found 6/11$939
This Delta deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/261:05 pmSNN - SEA
1 stop15h 27mDelta
Mon 6/303:55 pmSEA - SNN
1 stop35h 15mDelta
Deal found 6/11$951

Cheapflights Fare Finder

Customize your flight search to find flights from Ireland to Seattle 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 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Ireland to Seattle that are best for you.

Fly from

Ireland

Fly to

Seattle

Route

Depart

Return

Price

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/25

7:05 pm-2:00 pm

1 stop26h 55m

Seattle/Tacoma Intl

Sun 10/12

4:20 pm-6:15 pm

1 stop17h 55m

$408

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 9/10

12:15 pm-8:40 pm

1 stop16h 25m

Seattle/Tacoma Intl

Wed 10/1

3:45 pm-1:15 pm

1 stop13h 30m

$586

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 11/7

2:05 pm-9:36 am

1 stop27h 31m

Seattle/Tacoma Intl

Mon 11/10

11:45 am-7:35 pm

2 stops23h 50m

$587

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 10/8

12:45 pm-6:20 pm

1 stop13h 35m

Seattle/Tacoma Intl

Thu 10/23

1:30 pm-9:50 am

1 stop12h 20m

$672

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 9/9

8:55 am-4:05 pm

1 stop15h 10m

Seattle/Tacoma Intl

Thu 9/18

7:20 am-9:15 am

1 stop17h 55m

$673

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 11/7

5:55 am-2:45 pm

2 stops16h 50m

Seattle/Tacoma Intl

Mon 11/10

2:00 pm-3:40 pm

1 stop17h 40m

$674

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sun 6/22

12:40 pm-12:44 am

1 stop20h 04m

Seattle/Tacoma Intl

Sat 7/5

10:40 am-11:40 am

1 stop17h 00m

$699

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 7/15

4:10 pm-5:50 pm

Nonstop9h 40m

Seattle/Tacoma Intl

Mon 7/21

7:35 pm-12:40 pm

Nonstop9h 05m

$737

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 8/4

11:45 am-12:43 am

1 stop20h 58m

Seattle/Tacoma Intl

Wed 9/10

3:00 pm-11:40 am

1 stop12h 40m

$759

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sun 11/30

9:00 am-9:56 pm

1 stop20h 56m

Seattle/Tacoma Intl

Sun 2/15

11:50 pm-7:00 am

2 stops23h 10m

$797

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 27 results
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Best time to book a flight from Ireland to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Ireland 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 Ireland to Seattle

What is the cheapest month to book a flight from Ireland to Seattle?

Currently, January is the cheapest month in which you can book a flight from Ireland to Seattle (average of $238). Flying from Ireland to Seattle in July is currently the most expensive (average of $391). 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 IE to SEA?

Find hourly flight availability from Ireland to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

When flying from Ireland to Seattle, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated June 12, 2025.
Read reviews from past customers who have flown Delta, KLM and Air France from Ireland to Seattle. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,946 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
JetBlue
7.3
Good
2,925 reviews
Delta
8.0
Very good
7,946 reviews

Crew

8.5

Overall

8.0

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.2

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

Find useful and relevant information for your journey from Ireland to Seattle. 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 into for flights to Seattle from Ireland?

    If you book a flight to Seattle from Ireland, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How popular is this Ireland to Seattle flight route?

    This flight path from Ireland to Seattle/Tacoma Intl was viewed by 2 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 Ireland to Seattle one-way?

    One-way options have recently been found by users for as low as $433 on Icelandair. Other airlines that offer cheap prices include WestJet from $467 and Scandinavian Airlines from $579 one-way.

  • What are the most popular routes from Ireland to Seattle?

    The most popular route from Ireland to Seattle is Dublin - Seattle/Tacoma Intl. You may also consider Cork - Seattle/Tacoma Intl or Shannon - Seattle/Tacoma Intl.

  • What are the most reliable airlines from Ireland to Seattle?

    The top 3 most reliable airlines when flying from Ireland to Seattle are American Airlines (85%), Aer Lingus (85%) and British Airways (85%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $689 for a flight from Ireland to Seattle. The cheapest flight overall is $514 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $481.

  • Can I find deals for flights from Ireland to Seattle that include hotel bookings?

    Yes. In addition to deals on Ireland to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ireland to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ireland to Seattle.

  • Can I find deals for business class flights from Ireland to Seattle?

    Yes. Cheapflights offers flight deals from Ireland to Seattle 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 Ireland to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Ireland to Seattle (average of $238). Flying from Ireland to Seattle in July is currently the most expensive (average of $391). 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

Traveling to a place near Ireland?

Book flights to Ireland if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lacey
Leavenworth
Federal Way
Lynnwood
Olympia
Shoreline
Kent
Cle Elum
Centralia
Kirkland
Aberdeen
Renton
Shelton
Silverdale
Issaquah

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Alternative routes for Ireland to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Vicenza to Seattle flights
Linate to Seattle flights
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Arlanda to Seattle flights
Krakow to Seattle flights
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Hamburg to Seattle flights
Heathrow to Spokane flights

Top 3 airlines flying from Ireland to Seattle

Discover the top 3 airlines that operate flights from Ireland to Seattle. 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 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$556Average$834FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$605Average$858FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$684Average$832FlexibilityNo cancel feeOn-time71%

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