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Cheap flights from Ireland to Seattle from £343

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 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
31 May — 7 Jun1
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 1 May 2026.

Fri 22/515:25
DUB
-
SEA
Nonstop9h 45m
Aer Lingus
Wed 3/619:10
SEA
-
DUB
Nonstop9h 10m
Aer Lingus
Deal found 27/4£433
Mon 18/509:30
DUB
-
SEA
1 stop23h 06m
Finnair
Thu 28/510:27
SEA
-
DUB
1 stop17h 23m
Finnair
Deal found 29/4£437
Thu 25/609:30
DUB
-
SEA
1 stop23h 11m
Multiple Airlines
Tue 30/613:30
SEA
-
DUB
1 stop12h 10m
Multiple Airlines
Deal found 29/4£442
Thu 4/615:30
DUB
-
SEA
1 stop28h 05m
British Airways
Mon 8/620:20
SEA
-
DUB
1 stop34h 15m
British Airways
Deal found 30/4£443
Sat 23/518:45
DUB
-
SEA
1 stop24h 50m
British Airways
Sat 6/620:20
SEA
-
DUB
1 stop15h 10m
British Airways
Deal found 26/4£444
Tue 26/520:25
DUB
-
SEA
1 stop23h 10m
British Airways
Mon 8/620:20
SEA
-
DUB
1 stop31h 45m
British Airways
Deal found 28/4£445
Fri 15/509:30
DUB
-
SEA
1 stop21h 08m
Multiple Airlines
Mon 8/613:30
SEA
-
DUB
1 stop12h 10m
Multiple Airlines
Deal found 30/4£446
Sat 23/518:45
DUB
-
SEA
1 stop24h 50m
British Airways
Wed 3/608:10
SEA
-
DUB
2 stops19h 55m
British Airways
Deal found 26/4£446
Thu 4/608:35
DUB
-
SEA
2 stops24h 06m
British Airways
Wed 10/613:30
SEA
-
DUB
1 stop15h 25m
British Airways
Deal found 29/4£448
Sun 3/509:30
DUB
-
SEA
1 stop18h 06m
Finnair
Sat 16/507:10
SEA
-
DUB
1 stop18h 35m
Finnair
Deal found 26/4£449

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 1 May 2026.

Round-trip from

£433

One-way from

£343

Popular in

July

Cheapest in

February

Average price

£483

Good round-trip deal

£769 or less
Aer Lingus
  • Aer Lingus
  • 22/5-3/6
  • Nonstop
  • 18h 55m total
  • Ireland to Seattle
Search Deals
JetBlue
  • JetBlue
  • 10/6
  • 1 total stop
  • 17h 26m total
  • Ireland to Seattle
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£107 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£16 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 1 May 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

Mon 18/5

09:30-00:36

1 stop23h 06m

Seattle/Tacoma Intl

Thu 28/5

07:31-09:45

1 stop18h 14m

£447

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 22/5

09:30-00:16

1 stop22h 46m

Seattle/Tacoma Intl

Wed 3/6

07:31-09:45

1 stop18h 14m

£449

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 18/5

05:55-11:42

1 stop13h 47m

Seattle/Tacoma Intl

Thu 28/5

09:30-12:40

2 stops19h 10m

£462

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 22/5

05:55-16:37

2 stops18h 42m

Seattle/Tacoma Intl

Sun 24/5

22:35-10:00

1 stop27h 25m

£464

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 26/9

20:00-13:45

2 stops25h 45m

Seattle/Tacoma Intl

Sun 4/10

15:55-10:10

2 stops34h 15m

£475

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 4/6

20:20-11:35

1 stop23h 15m

Seattle/Tacoma Intl

Fri 3/7

13:30-17:50

1 stop20h 20m

£550
Fastest return journey

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 9/6

09:40-16:00

1 stop14h 20m

Seattle/Tacoma Intl

Tue 25/8

13:17-11:50

1 stop14h 33m

£553

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Wed 3/6

05:55-19:03

2 stops21h 08m

Seattle/Tacoma Intl

Tue 7/7

05:20-10:00

1 stop20h 40m

£573

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Sat 10/10

21:00-13:45

2 stops24h 45m

Seattle/Tacoma Intl

Fri 23/10

14:30-10:25

2 stops35h 55m

£580

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Tue 2/6

05:55-19:03

2 stops21h 08m

Seattle/Tacoma Intl

Tue 7/7

09:30-12:40

2 stops19h 10m

£595

Flights are sorted by cheapest return flights first.

Deals found on 26/4

Showing 1-10 of 18 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

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

The best time to book flights from Ireland to Seattle is 48 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.

What is the cheapest month to book a flight from Ireland to Seattle?

Currently, September is the cheapest month in which you can book a flight from Ireland to Seattle (average of £317). Flying from Ireland to Seattle in July is currently the most expensive (average of £554). 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 1 May 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 9% of weekly flights between Ireland and Seattle have experienced delays in the past year, with the average delay time being 158 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 1 May 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
1,767 reviews
Check prices

Crew

8.0

Comfort

7.3

Boarding

7.6

Overall

7.4

Entertainment

6.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Scandinavian Airlines
7.4
Good
1,767 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Crew

8.0

Comfort

7.3

Boarding

7.6

Overall

7.4

Entertainment

6.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Aer Lingus
7.3
Good
1,540 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Crew

8.0

Comfort

7.3

Boarding

7.6

Overall

7.4

Entertainment

6.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
American Airlines
7.1
Good
11,683 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Crew

8.0

Comfort

7.3

Boarding

7.6

Overall

7.4

Entertainment

6.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Icelandair
7.0
Good
646 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Crew

8.0

Comfort

7.3

Boarding

7.6

Overall

7.4

Entertainment

6.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
British Airways
6.7
Okay
7,937 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Crew

8.0

Comfort

7.3

Boarding

7.6

Overall

7.4

Entertainment

6.7

Food

6.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.

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 55 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 47m. Finnair provides one of the quickest options available for as low as £462. 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 £453. On average you can expect to pay £1,041. The most popular route, (Dublin - Seattle/Tacoma Intl), can usually be booked for £654.

  • 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, September is the cheapest month in which you can book a flight from Ireland to Seattle (average of £317). Flying from Ireland to Seattle in July is currently the most expensive (average of £554). 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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£317Average£413FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
IcelandairCheapest£341Average£516FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
British AirwaysCheapest£365Average£409FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£393Average£567FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
American AirlinesCheapest£536Average£663FlexibilityNo 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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