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Cheap flights from Ireland to Seattle from £318

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
24 Aug — 31 Aug1
1 adult

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 19 August 2025.

Round-trip from

£318

Popular in

July

Cheapest in

February

Average price

£663

Good round-trip deal

£575 or less
Icelandair
  • Icelandair
  • 2/10-9/10
  • 2 total stops
  • 22h 55m total
  • Ireland to Seattle
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£96 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£14 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals
Price to beat on a round-trip 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 19 August 2025.

Thu 2/1014:15DUB - SEA
1 stop11h 35mIcelandair
Thu 9/1015:45SEA - DUB
1 stop11h 20mIcelandair
Deal found 18/8£318
Mon 8/914:15DUB - SEA
1 stop11h 35mIcelandair
Sat 13/915:45SEA - DUB
1 stop11h 20mIcelandair
Deal found 18/8£327
Wed 17/912:15DUB - SEA
1 stop16h 25mIcelandair
Wed 24/919:00SEA - DUB
1 stop32h 05mIcelandair
Deal found 18/8£331
Thu 2/1012:40DUB - SEA
1 stop33h 20mScandinavian Airlines
Thu 9/1014:10SEA - DUB
2 stops20h 05mScandinavian Airlines
Deal found 18/8£392
Thu 28/814:15DUB - SEA
1 stop11h 35mIcelandair
Fri 1/515:45SEA - DUB
1 stop13h 30mIcelandair
Deal found 18/8£422
Thu 16/1019:05DUB - SEA
1 stop26h 55mScandinavian Airlines
Thu 23/1012:45SEA - DUB
2 stops21h 30mScandinavian Airlines
Deal found 18/8£424
Fri 5/911:45DUB - SEA
2 stops34h 05mScandinavian Airlines
Sun 21/916:20SEA - DUB
2 stops34h 35mScandinavian Airlines
Deal found 18/8£425
Fri 7/1111:30DUB - SEA
1 stop13h 30mIcelandair
Wed 12/1114:35SEA - DUB
1 stop11h 40mIcelandair
Deal found 18/8£466
Fri 7/1119:05DUB - SEA
2 stops35h 20mScandinavian Airlines
Mon 10/1111:40SEA - DUB
2 stops22h 40mScandinavian Airlines
Deal found 18/8£473

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 19 August 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 2/10

14:15-17:50

1 stop11h 35m

Seattle/Tacoma Intl

Thu 9/10

15:45-11:05

1 stop11h 20m

£318

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 8/9

14:15-17:50

1 stop11h 35m

Seattle/Tacoma Intl

Sat 13/9

15:45-11:05

1 stop11h 20m

£327

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 17/9

12:15-20:40

1 stop16h 25m

Seattle/Tacoma Intl

Wed 24/9

19:00-11:05

1 stop32h 05m

£331

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 2/10

12:40-14:00

1 stop33h 20m

Seattle/Tacoma Intl

Thu 9/10

14:10-18:15

2 stops20h 05m

£392

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 28/8

14:15-17:50

1 stop11h 35m

Seattle/Tacoma Intl

Fri 1/5

15:45-13:15

1 stop13h 30m

£422

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 16/10

19:05-14:00

1 stop26h 55m

Seattle/Tacoma Intl

Thu 23/10

12:45-18:15

2 stops21h 30m

£424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 5/9

11:45-13:50

2 stops34h 05m

Seattle/Tacoma Intl

Sun 21/9

16:20-10:55

2 stops34h 35m

£425

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 26/11

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Sun 30/11

14:35-10:15

1 stop11h 40m

£466

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 20/10

11:30-22:10

1 stop18h 40m

£400

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 8/10

11:30-22:10

1 stop18h 40m

£400

Flights are sorted by cheapest return flights first.

Deals found on 17/8

Showing 1-10 of 18 results
1
2

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 return 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 £622). Flying from Ireland to Seattle in July is currently the most expensive (average of £946). 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 19 August 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.

Weekly flight availability from Ireland to Seattle

Explore weekly flight availability from Ireland to Seattle. 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 19 August 2025.

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

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 19 August 2025.
Check out reviews from past customers who have flown with Scandinavian Airlines, American Airlines, andAer Lingus from Ireland to Seattle to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Scandinavian Airlines
7.4
Good
1,470 reviews
Check prices

Boarding

7.6

Comfort

7.3

Entertainment

6.6

Overall

7.4

Food

6.6

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Scandinavian Airlines
7.4
Good
1,470 reviews
Scandinavian Airlines
7.4
Good
1,470 reviews
Check prices

Boarding

7.6

Comfort

7.3

Entertainment

6.6

Overall

7.4

Food

6.6

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
American Airlines
7.2
Good
10,000 reviews
Scandinavian Airlines
7.4
Good
1,470 reviews
Check prices

Boarding

7.6

Comfort

7.3

Entertainment

6.6

Overall

7.4

Food

6.6

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Aer Lingus
7.2
Good
1,221 reviews
Scandinavian Airlines
7.4
Good
1,470 reviews
Check prices

Boarding

7.6

Comfort

7.3

Entertainment

6.6

Overall

7.4

Food

6.6

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
Icelandair
7.0
Good
529 reviews
Scandinavian Airlines
7.4
Good
1,470 reviews
Check prices

Boarding

7.6

Comfort

7.3

Entertainment

6.6

Overall

7.4

Food

6.6

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu
British Airways
6.7
Okay
7,283 reviews
Scandinavian Airlines
7.4
Good
1,470 reviews
Check prices

Boarding

7.6

Comfort

7.3

Entertainment

6.6

Overall

7.4

Food

6.6

Crew

8.0

Reviews

1 / 20
8.0
Excellent

Kent,Aug 2025

CPH - SEA

When I got to Copenhagen, my two suitcases were missing from Monday 1030. I got them back Friday after five in the afternoon. My flight from Copenhagen to Seattle did not make the connection from Seattle to Honolulu

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?

    For a flight from Ireland to Seattle, you will be flying into Seattle/Tacoma Intl. Seattle/Tacoma Intl (SEA) is just 11.4 mi from the center of the city.

  • How popular is this Ireland to Seattle flight route?

    Flights from Ireland to Seattle/Tacoma Intl have been viewed 85 times in the past calendar month.

  • How long is the flight from Ireland to Seattle?

    A quick flight from Ireland to Seattle can take about 11h 35m. Icelandair provides one of the quickest options available for as low as £318. Ireland and Seattle are separated by a distance of 4523 mi. This flight may include one or multiple stops.

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

    Before booking your flight to Seattle from Ireland, 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 Ireland to Seattle?

    The cheapest flight price from Ireland to Seattle is £388. On average you can expect to pay £673. The most popular route, (Dublin - Seattle/Tacoma Intl), can usually be booked for £725.

  • 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 holiday 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 £622). Flying from Ireland to Seattle in July is currently the most expensive (average of £946). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
Bothell
SeaTac

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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 5 airlines flying from Ireland to Seattle

Discover the top 5 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 858,174 searches. Data last updated 19 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£317Average£420FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
British AirwaysCheapest£346Average£495FlexibilityNo cancel feeOn-time70%
Search British Airways flights
IcelandairCheapest£379Average£490FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
Aer LingusCheapest£411Average£584FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£495Average£663FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Ireland to Seattle?

Cheapflights helps you search for flights from Ireland to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Ireland to Seattle?

It’s simple! Cheapflights, which is free to use for everyone, saves millions of users time and money every year by helping them find the cheapest and most suitable flights from Ireland to Seattle.

Can Cheapflights find flights from Ireland to Seattle with no change fees?

Yes, we can. To see specific flights from Ireland to Seattle with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Ireland to Seattle become cheaper?

Of course! You can now track prices for flights from Ireland to Seattle and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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