HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Seattle

$350+ 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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ireland to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 September 11, 2025.

Round-trip from

$416
(SmartFares)

One-way from

$350
(Kiwi.com)

Popular in

July

Cheapest in

February

Average price

$690

Good round-trip deal

$523 or less

Good one-way deal

$619 or less
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 ($179 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 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

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 September 11, 2025.

This SmartFares deal was found by Cheapflights users on 9/11. 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.
Thu 10/1612:40 pmDUB - SEA
1 stop33h 20mScandinavian Airlines
Wed 10/224:20 pmSEA - DUB
1 stop35h 30mScandinavian Airlines
Deal found 9/11$416
This lol.travel deal was found by Cheapflights users on 9/11. 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 lol.travel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/212:40 pmDUB - SEA
1 stop33h 20mScandinavian Airlines
Wed 10/154:20 pmSEA - DUB
1 stop35h 30mScandinavian Airlines
Deal found 9/11$462
This oojo deal was found by Cheapflights users on 9/10. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1110:15 amDUB - SEA
1 stop35h 45mScandinavian Airlines
Sun 10/194:20 pmSEA - DUB
1 stop35h 30mScandinavian Airlines
Deal found 9/10$475
This TravelUp deal was found by Cheapflights users on 9/10. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:00 amDUB - SEA
1 stop15h 10mLufthansa
Tue 11/117:00 amSEA - DUB
1 stop17h 10mLufthansa
Deal found 9/10$517
This Gotogate deal was found by Cheapflights users on 9/11. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/311:30 amDUB - SEA
1 stop13h 30mIcelandair
Sun 11/162:35 pmSEA - DUB
1 stop11h 40mIcelandair
Deal found 9/11$520
This TravelUp deal was found by Cheapflights users on 9/10. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:10 amDUB - SEA
2 stops21h 42mLufthansa
Mon 11/107:00 amSEA - DUB
1 stop17h 10mLufthansa
Deal found 9/10$522
This TravelUp deal was found by Cheapflights users on 9/11. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:40 pmDUB - SEA
1 stop29h 50mMultiple Airlines
Fri 11/141:35 pmSEA - DUB
1 stop12h 25mMultiple Airlines
Deal found 9/11$533
This Kiwi.com deal was found by Cheapflights users on 9/9. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:55 amDUB - SEA
1 stop14h 00mLufthansa
Sun 10/127:00 amSEA - DUB
1 stop18h 45mLufthansa
Deal found 9/9$544
This Delta deal was found by Cheapflights users on 9/11. 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 9/186:00 amORK - SEA
1 stop13h 45mDelta
Tue 9/231:30 pmSEA - ORK
1 stop17h 10mDelta
Deal found 9/11$569
This United Airlines deal was found by Cheapflights users on 9/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/912:30 pmSNN - SEA
2 stops20h 29mUnited Airlines
Thu 10/166:35 amSEA - SNN
2 stops19h 40mUnited Airlines
Deal found 9/11$575
This American Airlines deal was found by Cheapflights users on 9/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/157:50 amSNN - SEA
2 stops23h 28mAmerican Airlines
Tue 11/181:25 pmSEA - SNN
1 stop14h 05mAmerican Airlines
Deal found 9/10$712
This American Airlines deal was found by Cheapflights users on 9/11. 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 10/99:15 pmSNN - SEA
1 stop22h 20mAmerican Airlines
Thu 10/168:20 pmSEA - SNN
1 stop16h 15mAmerican Airlines
Deal found 9/11$838

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 September 11, 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

Wed 11/5

10:40 am-6:52 pm

1 stop16h 12m

Seattle/Tacoma Intl

Mon 11/10

7:00 am-8:10 am

1 stop17h 10m

$539

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 9/24

5:55 am-11:55 am

1 stop14h 00m

Seattle/Tacoma Intl

Sun 10/12

7:00 am-9:45 am

1 stop18h 45m

$544

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 11/7

1:40 pm-11:30 am

1 stop29h 50m

Seattle/Tacoma Intl

Mon 11/10

6:50 pm-7:40 pm

1 stop16h 50m

$545

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/25

5:55 am-2:16 pm

2 stops16h 21m

Seattle/Tacoma Intl

Sun 9/28

8:00 am-10:20 am

1 stop18h 20m

$551

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/25

4:10 pm-5:50 pm

Nonstop9h 40m

Seattle/Tacoma Intl

Sat 10/11

7:35 pm-12:35 pm

Nonstop9h 00m

$554

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/25

9:20 am-7:31 pm

1 stop18h 11m

Seattle/Tacoma Intl

Sat 10/11

1:12 pm-10:20 am

1 stop13h 08m

$558

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 9/24

9:20 am-2:16 pm

1 stop12h 56m

Seattle/Tacoma Intl

Sun 10/12

5:00 am-9:45 am

2 stops20h 45m

$560

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 11/7

9:00 am-12:59 am

2 stops23h 59m

Seattle/Tacoma Intl

Mon 11/10

5:05 am-8:10 am

2 stops19h 05m

$561

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 11/7

9:00 am-12:59 am

2 stops23h 59m

Seattle/Tacoma Intl

Wed 11/12

8:36 am-10:20 am

2 stops17h 44m

$561

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 11/6

5:00 am-10:16 pm

2 stops25h 16m

Seattle/Tacoma Intl

Tue 11/11

5:50 am-7:10 am

2 stops17h 20m

$562

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 29 results
1
2
3

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 June is currently the most expensive (average of $388). 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 September 11, 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 September 11, 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
10,000 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

Crew

8.0

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
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

Crew

8.0

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
1,271 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

Crew

8.0

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
7.0
Good
546 reviews
American Airlines
7.2
Good
10,000 reviews

Boarding

7.5

Overall

7.2

Entertainment

6.9

Food

6.4

Crew

8.0

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 16h 12m. Lufthansa provides one of the quickest options available for as low as $539. 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 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 (78%), Aer Lingus (78%) and British Airways (78%).

  • What are the cheapest flights from Ireland to Seattle?

    On average you can expect to pay $847 for a flight from Ireland to Seattle. The cheapest flight overall is $523 while the most popular route, (Dublin - Seattle/Tacoma Intl) is currently priced at $492.

  • 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 June is currently the most expensive (average of $388). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Lacey
Renton
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Ireland to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
Frankfurt to Seattle flights
Heathrow to Seattle flights
Charles de Gaulle to Seattle flights
Gatwick to Seattle flights
Orly to Seattle flights
Bruxelles-National to Seattle flights
Amsterdam to Seattle flights
Frankfurt-Hahn to Seattle flights
Amsterdam to Portland flights
Madrid to Seattle flights
Munich to Seattle flights
Heathrow to Portland flights
Berlin to Seattle flights
Charles de Gaulle to Portland flights
Stansted to Seattle flights
Dublin to Seattle flights
Luton to Seattle flights
Oslo Gardermoen to Seattle flights
Arlanda to Seattle flights
Duesseldorf Intl to Seattle flights
Gatwick to Portland flights
Zurich to Seattle flights
Vienna to Seattle flights
Frederic Chopin to Seattle flights
Frankfurt to Portland flights
Istanbul to Seattle flights
Belgrade to Seattle flights
Bremen to Seattle flights
Copenhagen to Seattle flights
Manchester to Seattle flights
Hamburg to Seattle flights
Leonardo da Vinci/Fiumicino to Seattle flights
Málaga to Seattle flights
Prague to Seattle flights
Edinburgh to Seattle flights
Linate to Seattle flights
Bergamo to Seattle flights
Madrid to Portland flights
Frankfurt to Spokane flights
Barcelona-El Prat to Seattle flights
Nice to Portland flights
Budapest to Seattle flights
Pisa to Seattle flights
Krakow to Seattle flights
Nice to Seattle 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$525Average$781FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$556Average$712FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$684Average$787FlexibilityNo cancel feeOn-time71%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.