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Cheap flights from Ireland to Seattle from £388

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 24/7. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
10 Jul — 17 Jul1
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 10 June 2026.

Mon 14/910:40
DUB
-
SEA
1 stop19h 58m
JetBlue
Sun 20/923:55
SEA
-
DUB
1 stop24h 25m
JetBlue
Deal found 6/6£451
Tue 15/910:40
DUB
-
SEA
1 stop19h 58m
JetBlue
Tue 6/1023:55
SEA
-
DUB
1 stop24h 25m
JetBlue
Deal found 9/6£452
Sat 5/920:00
DUB
-
SEA
2 stops25h 45m
Scandinavian Airlines
Sun 4/1015:55
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 8/6£455
Sat 19/920:00
DUB
-
SEA
2 stops25h 45m
Scandinavian Airlines
Tue 29/915:55
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 8/6£459
Sat 26/920:00
DUB
-
SEA
2 stops25h 45m
Scandinavian Airlines
Sun 4/1015:55
SEA
-
DUB
1 stop18h 25m
Scandinavian Airlines
Deal found 8/6£459
Mon 14/919:05
DUB
-
SEA
1 stop26h 40m
Scandinavian Airlines
Sun 20/915:55
SEA
-
DUB
2 stops19h 10m
Scandinavian Airlines
Deal found 6/6£465

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 10 June 2026.

Round-trip from

£451

One-way from

£388

Popular in

July

Cheapest in

November

Average price

£589

Good round-trip deal

£458 or less
JetBlue
  • JetBlue
  • 14/9-20/9
  • 2 total stops
  • 44h 23m total
  • Ireland to Seattle
Search Deals
24/7
  • 24/7
  • 3 total stops
  • 46h 35m total
  • Ireland to Seattle
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£104 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 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 10 June 2026.
Use the filters below to find and compare flights from Ireland to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 26/9

20:00-13:45

2 stops25h 45m

Seattle/Tacoma Intl

Sun 4/10

15:55-18:20

1 stop18h 25m

£459

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 10/10

14:15-20:40

1 stop14h 25m

Seattle/Tacoma Intl

Fri 23/10

19:00-11:15

1 stop32h 15m

£498
Fastest return journey

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 26/9

14:15-20:40

1 stop14h 25m

Seattle/Tacoma Intl

Sun 4/10

15:40-13:15

1 stop13h 35m

£502
Cheapest one-way

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sun 26/7

10:40-22:54

1 stop20h 14m

£412

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 24/7

13:00-09:40

1 stop28h 40m

£516

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 27/7

10:30-18:25

1 stop15h 55m

£669
Fastest single journey

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 24/7

15:25-17:10

Nonstop9h 45m

£802

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 25/8

09:50-19:08

3 stops41h 18m

£1,095

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 2/10

11:35-23:26

3 stops19h 51m

£1,102

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sun 9/8

09:30-23:20

3 stops21h 50m

£1,102

Flights are sorted by cheapest return flights first.

Deals found on 5/6

Showing 1-10 of 13 resultsSorted by cheapest first
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, August is the cheapest month in which you can book a flight from Ireland to Seattle (average of £321). Flying from Ireland to Seattle in July is currently the most expensive (average of £560). 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 10 June 2026.

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.

How often are flights from Ireland to Seattle delayed?

About 10% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 168 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 10% of flights being delayed.

How far ahead should I book a flight from Ireland to Seattle?

The best time to book flights from Ireland to Seattle is 50 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 10 June 2026.
Check out reviews from past customers who have flown with Scandinavian Airlines,Aer Lingus, andAmerican Airlines 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
1,815 reviews
Check prices

Overall

7.4

Boarding

7.6

Crew

8.0

Comfort

7.3

Entertainment

6.7

Food

6.7

Reviews

1 / 20
6.0
Good

lisa,May 2026

ALC - OSL

Uncomfortable seats on packed flight. There was plenty of overhead bin space. Cabin crew weren't friendly but the cockpit pointed out things we were flying over, like Paris. Cup of coffee, tea or water for 3.5hrs. Good de-planing from both ends.
Scandinavian Airlines
7.4
Good
1,815 reviews
Scandinavian Airlines
7.4
Good
1,815 reviews
Check prices

Overall

7.4

Boarding

7.6

Crew

8.0

Comfort

7.3

Entertainment

6.7

Food

6.7

Reviews

1 / 20
6.0
Good

lisa,May 2026

ALC - OSL

Uncomfortable seats on packed flight. There was plenty of overhead bin space. Cabin crew weren't friendly but the cockpit pointed out things we were flying over, like Paris. Cup of coffee, tea or water for 3.5hrs. Good de-planing from both ends.
Aer Lingus
7.3
Good
1,602 reviews
Scandinavian Airlines
7.4
Good
1,815 reviews
Check prices

Overall

7.4

Boarding

7.6

Crew

8.0

Comfort

7.3

Entertainment

6.7

Food

6.7

Reviews

1 / 20
6.0
Good

lisa,May 2026

ALC - OSL

Uncomfortable seats on packed flight. There was plenty of overhead bin space. Cabin crew weren't friendly but the cockpit pointed out things we were flying over, like Paris. Cup of coffee, tea or water for 3.5hrs. Good de-planing from both ends.
American Airlines
7.1
Good
11,636 reviews
Scandinavian Airlines
7.4
Good
1,815 reviews
Check prices

Overall

7.4

Boarding

7.6

Crew

8.0

Comfort

7.3

Entertainment

6.7

Food

6.7

Reviews

1 / 20
6.0
Good

lisa,May 2026

ALC - OSL

Uncomfortable seats on packed flight. There was plenty of overhead bin space. Cabin crew weren't friendly but the cockpit pointed out things we were flying over, like Paris. Cup of coffee, tea or water for 3.5hrs. Good de-planing from both ends.
Icelandair
7.0
Good
672 reviews
Scandinavian Airlines
7.4
Good
1,815 reviews
Check prices

Overall

7.4

Boarding

7.6

Crew

8.0

Comfort

7.3

Entertainment

6.7

Food

6.7

Reviews

1 / 20
6.0
Good

lisa,May 2026

ALC - OSL

Uncomfortable seats on packed flight. There was plenty of overhead bin space. Cabin crew weren't friendly but the cockpit pointed out things we were flying over, like Paris. Cup of coffee, tea or water for 3.5hrs. Good de-planing from both ends.
British Airways
6.7
Okay
8,038 reviews
Scandinavian Airlines
7.4
Good
1,815 reviews
Check prices

Overall

7.4

Boarding

7.6

Crew

8.0

Comfort

7.3

Entertainment

6.7

Food

6.7

Reviews

1 / 20
6.0
Good

lisa,May 2026

ALC - OSL

Uncomfortable seats on packed flight. There was plenty of overhead bin space. Cabin crew weren't friendly but the cockpit pointed out things we were flying over, like Paris. Cup of coffee, tea or water for 3.5hrs. Good de-planing from both ends.

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 40 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 25h 45m. Scandinavian Airlines provides one of the quickest options available for as low as £459. Ireland and Seattle are separated by a distance of 4523 mi.

  • 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 (81%), Aer Lingus (81%), Iberia( 81%).

  • What are the cheapest flights from Ireland to Seattle?

    The cheapest flight price from Ireland to Seattle is £436. On average you can expect to pay £579. The most popular route, (Dublin - Seattle/Tacoma Intl), can usually be booked for £645.

  • 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, August is the cheapest month in which you can book a flight from Ireland to Seattle (average of £321). Flying from Ireland to Seattle in July is currently the most expensive (average of £560). 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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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 10 June 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£321Average£418FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£345Average£496FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£369Average£428FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£398Average£570FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£542Average£670FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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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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