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Cheap flights from Ireland to Seattle from £255

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 28/5. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
27 Feb — 6 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Ireland to Seattle

Enter your travel dates to find the best prices.

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 28 January 2026.

Wed 4/311:30
DUB
-
SEA
1 stop13h 30m
Icelandair
Mon 9/315:35
SEA
-
DUB
1 stop11h 40m
Icelandair
Deal found 26/1£326
Fri 11/912:15
DUB
-
SEA
1 stop13h 40m
Icelandair
Fri 2/1015:40
SEA
-
DUB
1 stop13h 35m
Icelandair
Deal found 25/1£328
Fri 15/509:30
DUB
-
SEA
1 stop20h 56m
Multiple Airlines
Mon 8/620:20
SEA
-
DUB
1 stop14h 20m
Multiple Airlines
Deal found 26/1£335
Sat 19/920:15
DUB
-
SEA
1 stop23h 20m
Multiple Airlines
Tue 29/913:35
SEA
-
DUB
1 stop17h 10m
Multiple Airlines
Deal found 26/1£337
Thu 3/914:15
DUB
-
SEA
1 stop14h 25m
Icelandair
Wed 23/915:40
SEA
-
DUB
1 stop13h 35m
Icelandair
Deal found 27/1£339
Mon 18/509:30
DUB
-
SEA
1 stop22h 09m
Finnair
Mon 25/513:18
SEA
-
DUB
1 stop14h 32m
Finnair
Deal found 27/1£341
Sat 10/1018:45
DUB
-
SEA
1 stop24h 50m
Multiple Airlines
Fri 23/1007:49
SEA
-
DUB
1 stop17h 56m
Multiple Airlines
Deal found 27/1£343
Fri 6/211:30
DUB
-
SEA
1 stop13h 30m
Icelandair
Sun 8/214:35
SEA
-
DUB
1 stop11h 40m
Icelandair
Deal found 27/1£344
Fri 6/1111:30
DUB
-
SEA
1 stop13h 30m
Icelandair
Tue 10/1114:35
SEA
-
DUB
1 stop11h 40m
Icelandair
Deal found 24/1£346

Find flight deals from Ireland to Seattle

Keep the following information in mind while searching for Ireland to Seattle flight deals. Data was last updated 28 January 2026.

Round-trip from

£326

One-way from

£255

Popular in

July

Cheapest in

February

Average price

£467

Good round-trip deal

£466 or less
Icelandair
  • Icelandair
  • 4/3-9/3
  • 2 total stops
  • 25h 10m total
  • Ireland to Seattle
Search Deals
WestJet
  • WestJet
  • 28/5
  • 2 total stops
  • 55h 40m total
  • Ireland to Seattle
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£98 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 January 2026
Search Deals
Price to beat on a round-trip flight from Ireland to Seattle/Tacoma Intl.
Search Deals

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 28 January 2026.
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

Fri 15/5

09:30-22:26

1 stop20h 56m

Seattle/Tacoma Intl

Mon 8/6

20:20-18:40

1 stop14h 20m

£335

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 18/5

09:30-23:39

1 stop22h 09m

Seattle/Tacoma Intl

Mon 25/5

13:18-11:50

1 stop14h 32m

£341

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 6/2

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Sun 8/2

14:35-10:15

1 stop11h 40m

£344

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 23/2

17:55-11:30

1 stop25h 35m

Seattle/Tacoma Intl

Mon 9/3

13:37-19:40

2 stops23h 03m

£360

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 23/2

17:55-11:30

1 stop25h 35m

Seattle/Tacoma Intl

Sun 8/3

13:37-18:35

2 stops21h 58m

£379

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 4/3

08:20-17:00

2 stops16h 40m

Seattle/Tacoma Intl

Mon 9/3

15:35-21:20

2 stops22h 45m

£398

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 27/2

05:55-11:40

1 stop13h 45m

Seattle/Tacoma Intl

Sat 7/3

07:30-09:20

1 stop17h 50m

£414

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 11/3

17:15-12:35

1 stop26h 20m

Seattle/Tacoma Intl

Wed 18/3

07:20-09:20

1 stop19h 00m

£414

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 4/3

05:55-11:35

1 stop13h 40m

Seattle/Tacoma Intl

Mon 9/3

11:25-15:45

2 stops21h 20m

£415

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 30/4

09:40-09:40

2 stops32h 00m

£259

Flights are sorted by cheapest return flights first.

Deals found on 26/1

Showing 1-10 of 19 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, February is the cheapest month in which you can book a flight from Ireland to Seattle (average of £341). Flying from Ireland to Seattle in July is currently the most expensive (average of £575). 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.

How often are flights from Ireland to Seattle delayed?

About 9% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 159 minutes.

What is the most punctual flight time for Ireland to Seattle flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the early afternoon tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Tuesday tends to have the lowest number of delays on this route, whereas Saturday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ireland to Seattle flights?

Over the past year, Aer Lingus have had the lowest number of delays on this route, with just 9% of flights being delayed.

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 28 January 2026.
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
7.3
Good
1,672 reviews
Check prices

Overall

7.3

Food

6.7

Crew

8.0

Entertainment

6.6

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
Scandinavian Airlines
7.3
Good
1,672 reviews
Scandinavian Airlines
7.3
Good
1,672 reviews
Check prices

Overall

7.3

Food

6.7

Crew

8.0

Entertainment

6.6

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
American Airlines
7.2
Good
11,200 reviews
Scandinavian Airlines
7.3
Good
1,672 reviews
Check prices

Overall

7.3

Food

6.7

Crew

8.0

Entertainment

6.6

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
Aer Lingus
7.2
Good
1,442 reviews
Scandinavian Airlines
7.3
Good
1,672 reviews
Check prices

Overall

7.3

Food

6.7

Crew

8.0

Entertainment

6.6

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
Icelandair
7.1
Good
603 reviews
Scandinavian Airlines
7.3
Good
1,672 reviews
Check prices

Overall

7.3

Food

6.7

Crew

8.0

Entertainment

6.6

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that
British Airways
6.7
Okay
7,704 reviews
Scandinavian Airlines
7.3
Good
1,672 reviews
Check prices

Overall

7.3

Food

6.7

Crew

8.0

Entertainment

6.6

Boarding

7.6

Comfort

7.3

Reviews

1 / 20
2.0
Mediocre

Anonymous,Dec 2025

SFO - CPH

Flight was changed causing 5 hour layover in Copenhagen And no accommodations were made to account for this at the lounge or anything like that

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 68 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 13h 30m. Finnair provides one of the quickest options available for as low as £344. 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 (86%), Aer Lingus (86%), British Airways( 86%).

  • What are the cheapest flights from Ireland to Seattle?

    The cheapest flight price from Ireland to Seattle is £401. On average you can expect to pay £546. The most popular route, (Dublin - Seattle/Tacoma Intl), can usually be booked for £714.

  • 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, February is the cheapest month in which you can book a flight from Ireland to Seattle (average of £341). Flying from Ireland to Seattle in July is currently the most expensive (average of £575). 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
Federal Way
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 28 January 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£313Average£414FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
British AirwaysCheapest£373Average£437FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£401Average£557FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£417Average£497FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
American AirlinesCheapest£528Average£653FlexibilityNo 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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