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Cheap flights from Ireland to Seattle from £313

DUB — SEA
24 Oct — 31 Oct1
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

Mon 23/1111:30 -
1 stop13h 30m
Sun 29/1114:35 -
1 stop11h 40m
Deal found 22/9£405
Thu 26/1111:30 -
1 stop13h 30m
Sun 6/1214:35 -
1 stop11h 40m
Deal found 24/9£418
Fri 2/1012:15 -
1 stop16h 25m
Fri 16/1015:40 -
1 stop13h 35m
Deal found 24/9£419
Thu 26/1111:30 -
1 stop13h 30m
Fri 4/1214:35 -
1 stop11h 40m
Deal found 24/9£427
Tue 20/1014:15 -
1 stop14h 25m
Sun 29/1114:35 -
1 stop11h 40m
Deal found 24/9£438
Thu 1/1012:40 -
2 stops16h 00m
Wed 14/1015:40 -
2 stops20h 10m
Deal found 24/9£439
Wed 25/1111:30 -
1 stop13h 30m
Mon 7/1214:35 -
1 stop11h 40m
Deal found 24/9£444
Mon 23/1111:30 -
1 stop13h 30m
Mon 7/1214:35 -
1 stop11h 40m
Deal found 24/9£449
Tue 24/1111:30 -
1 stop13h 30m
Fri 4/1214:35 -
1 stop11h 40m
Deal found 24/9£451
Mon 2/1120:40 -
1 stop22h 45m
Sun 15/1118:45 -
1 stop12h 10m
Deal found 24/9£452
Sat 7/1111:00 -
1 stop13h 50m
Sat 14/1113:40 -
1 stop12h 15m
Deal found 23/9£454
Thu 5/1110:50 -
1 stop14h 00m
Thu 12/1118:45 -
1 stop12h 10m
Deal found 21/9£456

Find flight deals from Ireland to Seattle

Round-trip from

£405

One-way from

£313

Popular in

July

Cheapest in

April

Average price

£615

Good round-trip deal

£2,183 or less

Good one-way deal

£509 or less
Icelandair
  • Icelandair
  • 23/11-29/11
  • 2 total stops
  • 25h 10m total
  • Ireland to Seattle
Search Deals
Delta
  • Delta
  • 2/12-31/12
  • 1 total stop
  • 14h 05m total
  • Ireland to Seattle
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£106 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2026
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Price to beat on a round-trip flight from Ireland to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Ireland to Seattle/Tacoma Intl.
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Cheapflights Fare Finder

 
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 Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Thu 3/12

05:45-11:50

1 stop14h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£313

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Wed 2/12

05:45-11:50

1 stop14h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£313

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Tue 1/12

10:45-20:18

1 stop17h 33m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£324

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Wed 14/10

10:40-22:42

1 stop20h 02m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£417

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Thu 22/10

10:40-22:42

1 stop20h 02m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£433

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Fri 8/1

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Mon 18/1

14:35-10:15

1 stop11h 40m

£451
Fastest return journey

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Mon 5/10

15:25-17:10

Nonstop9h 45m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£463

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Fri 16/10

11:30-21:20

1 stop17h 50m

Seattle/Tacoma Intl

Wed 31/12

00:00-09:00

Nonstop0h 00m

£472

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Thu 12/11

05:45-11:47

1 stop14h 02m

Seattle/Tacoma Intl

Wed 25/11

09:25-14:30

2 stops21h 05m

£472

DublinSeattle

DUB Dublin - SEA Seattle/Tacoma Intl

DUBSEA

Dublin

Wed 10/2

05:45-16:35

2 stops18h 50m

Seattle/Tacoma Intl

Sat 20/2

16:05-18:25

1 stop18h 20m

£472

Flights are sorted by cheapest return flights first.

Deals found on 23/9

Showing 1-10 of 21 resultsSorted by cheapest first
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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 return price

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, April is the cheapest month in which you can book a flight from Ireland to Seattle (average of £456). Flying from Ireland to Seattle in July is currently the most expensive (average of £787). 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?

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

The most flights from IE0 to SEA are scheduled on a Monday (4 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (4 on average).

How often are flights from Ireland to Seattle delayed?

About 12% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 163 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 12% 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

Check out reviews from past customers who have flown with Aer Lingus,Icelandair, andBritish Airways 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.
Aer Lingus
7.3
Good
1,788 reviews
Check prices

Crew

8.1

Food

6.7

Boarding

7.4

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Michael,Sept 2026

DUB - JFK

Food and service was great. Wish the USB on the planes worked so I could charge and use my phone on the flight
Aer Lingus
7.3
Good
1,788 reviews
Aer Lingus
7.3
Good
1,788 reviews
Check prices

Crew

8.1

Food

6.7

Boarding

7.4

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Michael,Sept 2026

DUB - JFK

Food and service was great. Wish the USB on the planes worked so I could charge and use my phone on the flight
Icelandair
6.9
Okay
751 reviews
Aer Lingus
7.3
Good
1,788 reviews
Check prices

Crew

8.1

Food

6.7

Boarding

7.4

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Michael,Sept 2026

DUB - JFK

Food and service was great. Wish the USB on the planes worked so I could charge and use my phone on the flight
British Airways
6.7
Okay
8,227 reviews
Aer Lingus
7.3
Good
1,788 reviews
Check prices

Crew

8.1

Food

6.7

Boarding

7.4

Overall

7.3

Comfort

7.2

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Michael,Sept 2026

DUB - JFK

Food and service was great. Wish the USB on the planes worked so I could charge and use my phone on the flight

Related info for your journey

  • 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 26 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. Icelandair provides one of the quickest options available for as low as £451. 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 (77%), Aer Lingus (77%), Iberia( 77%).

  • What are the cheapest flights from Ireland to Seattle?

    The cheapest flight price from Ireland to Seattle is £465. On average you can expect to pay £1,468. The most popular route, (Dublin - Seattle/Tacoma Intl), can usually be booked for £479.

  • 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, April is the cheapest month in which you can book a flight from Ireland to Seattle (average of £456). Flying from Ireland to Seattle in July is currently the most expensive (average of £787). 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
Federal Way
SeaTac

Browse thousands of different options on Cheapflights for your next trip

Top 3 airlines flying from Ireland to Seattle

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest£347Average£562FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£374Average£454FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£415Average£627FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights

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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.

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