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$375+ 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 1/21. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
1 adult, Economy
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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 October 29, 2025.

This Mytrip deal was found by Cheapflights users on 10/28. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/2711:30 amDUB - SEA
1 stop13h 30mIcelandair
Thu 12/42:35 pmSEA - DUB
1 stop11h 40mIcelandair
Deal found 10/28$471
This Gotogate deal was found by Cheapflights users on 10/29. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:30 amDUB - SEA
1 stop13h 30mIcelandair
Sun 12/142:35 pmSEA - DUB
1 stop11h 40mIcelandair
Deal found 10/29$472
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/2710:30 amDUB - SEA
1 stop33h 00mAmerican Airlines
Mon 12/111:42 amSEA - DUB
2 stops21h 23mAmerican Airlines
Deal found 10/28$496
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sun 11/2312:55 pmDUB - SEA
1 stop18h 10mAmerican Airlines
Sat 12/61:35 pmSEA - DUB
1 stop12h 15mAmerican Airlines
Deal found 10/27$502
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Sun 11/911:30 amDUB - SEA
1 stop18h 50mAmerican Airlines
Sun 11/2312:59 amSEA - DUB
2 stops24h 51mAmerican Airlines
Deal found 10/27$503
This American Airlines deal was found by Cheapflights users on 10/28. 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 11/2112:55 pmDUB - SEA
1 stop16h 21mAmerican Airlines
Mon 12/111:42 amSEA - DUB
2 stops21h 23mAmerican Airlines
Deal found 10/28$504
This Air France deal was found by Cheapflights users on 10/27. 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.
Wed 11/265:55 amDUB - SEA
1 stop13h 50mMultiple Airlines
Tue 12/21:40 pmSEA - DUB
1 stop18h 05mMultiple Airlines
Deal found 10/27$505
This Icelandair deal was found by Cheapflights users on 10/28. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/711:30 amDUB - SEA
1 stop13h 30mIcelandair
Mon 11/102:35 pmSEA - DUB
1 stop11h 40mIcelandair
Deal found 10/28$506
This American Airlines deal was found by Cheapflights users on 10/28. 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.
Sat 11/2211:30 amDUB - SEA
2 stops31h 14mAmerican Airlines
Sat 11/291:35 pmSEA - DUB
1 stop12h 15mAmerican Airlines
Deal found 10/28$507
This Delta deal was found by Cheapflights users on 10/29. 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.
Sat 11/225:55 amDUB - SEA
1 stop13h 50mDelta
Sat 12/136:00 amSEA - DUB
1 stop17h 45mDelta
Deal found 10/29$509
This American Airlines deal was found by Cheapflights users on 10/27. 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.
Mon 11/107:50 amSNN - SEA
2 stops23h 28mAmerican Airlines
Sun 11/1611:42 amSEA - SNN
2 stops15h 48mAmerican Airlines
Deal found 10/27$662
This British Airways deal was found by Cheapflights users on 10/28. 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.
Sun 11/98:05 pmSNN - SEA
2 stops35h 13mBritish Airways
Sun 11/162:46 pmSEA - SNN
2 stops44h 39mBritish Airways
Deal found 10/28$664

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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$471
(Mytrip)

One-way from

$375
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$667

Good round-trip deal

$562 or less

Good one-way deal

$635 or less
Provider with most accurate pricing for Dublin-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Dublin-Seattle/Tacoma Intl flights.
Search Deals
From Ireland to Seattle/Tacoma Intl
Search Deals
One-way flight from Ireland to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($177 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals
Price to beat on a round-trip flight from Ireland to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Ireland to Seattle/Tacoma Intl.
Search Deals

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 October 29, 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

Tue 11/25

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

Tue 12/2

9:30 am-3:45 pm

2 stops22h 15m

$509

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 11/22

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

Sat 11/29

6:00 am-7:45 am

1 stop17h 45m

$509

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 11/22

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

Sat 12/13

7:20 am-8:45 am

1 stop17h 25m

$510

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sun 11/23

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

Sun 12/7

9:45 am-12:40 pm

2 stops18h 55m

$511

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 11/8

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

Mon 11/10

6:00 am-12:40 pm

2 stops22h 40m

$512

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 11/24

5:55 am-6:41 pm

2 stops20h 46m

Seattle/Tacoma Intl

Mon 12/1

2:05 pm-3:45 pm

1 stop17h 40m

$512

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 11/15

5:55 am-10:23 pm

2 stops24h 28m

Seattle/Tacoma Intl

Mon 12/1

2:05 pm-3:45 pm

1 stop17h 40m

$514

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 12/11

5:55 am-8:35 pm

2 stops22h 40m

Seattle/Tacoma Intl

Thu 12/18

9:25 am-7:45 am

1 stop14h 20m

$515

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 11/24

4:30 pm-6:20 pm

Nonstop9h 50m

Seattle/Tacoma Intl

Mon 12/1

8:05 pm-1:10 pm

Nonstop9h 05m

$517

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sun 11/9

5:55 am-9:14 pm

2 stops23h 19m

Seattle/Tacoma Intl

Mon 11/24

7:15 am-12:40 pm

2 stops21h 25m

$517

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/27

Showing 1-10 of 35 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, March is the cheapest month in which you can book a flight from Ireland to Seattle (average of $480). Flying from Ireland to Seattle in July is currently the most expensive (average of $792). 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 October 29, 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.

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 October 29, 2025.
Read through reviews of airlines operating flights from Ireland to Seattle, such as American Airlines, Aer Lingus, and Icelandair. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
11,032 reviews

Crew

8.0

Food

6.4

Boarding

7.5

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Nordia,Sep 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.
American Airlines
7.2
Good
11,032 reviews
American Airlines
7.2
Good
11,032 reviews

Crew

8.0

Food

6.4

Boarding

7.5

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Nordia,Sep 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.
Aer Lingus
7.2
Good
1,361 reviews
American Airlines
7.2
Good
11,032 reviews

Crew

8.0

Food

6.4

Boarding

7.5

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Nordia,Sep 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.
Icelandair
7.1
Good
562 reviews
American Airlines
7.2
Good
11,032 reviews

Crew

8.0

Food

6.4

Boarding

7.5

Entertainment

6.9

Overall

7.2

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Nordia,Sep 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.

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.

  • How long is the flight from Ireland to Seattle?

    A quick flight from Ireland to Seattle can take about 13h 50m. Delta provides one of the quickest options available for as low as $509. There are 4523 mi between Ireland and Seattle. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 Shannon - Seattle/Tacoma Intl or Cork - 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 Aer Lingus (87%), British Airways (75%) and American Airlines (75%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $644 for a flight from Ireland to Seattle. The cheapest flight overall is $518 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $468.

  • 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, March is the cheapest month in which you can book a flight from Ireland to Seattle (average of $480). Flying from Ireland to Seattle in July is currently the most expensive (average of $792). 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 Seattle?

Book flights to Seattle if you plan to visit one of these locations
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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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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 October 29, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$525Average$724FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$556Average$712FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$640Average$860FlexibilityNo cancel feeOn-time71%

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