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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 7/4. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — SEA
29 Nov — 6 Dez1
1 adult
1 adult, Economy, 0 bags

Find 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 30 Oktober 2025.

Do 27/1111:30DUB - SEA
1 stop13h 30mIcelandair
Do 4/1214:35SEA - DUB
1 stop11h 40mIcelandair
Deal found 28/10£356
Mi 3/1211:30DUB - SEA
1 stop13h 30mIcelandair
So 14/1214:35SEA - DUB
1 stop11h 40mIcelandair
Deal found 29/10£357
Do 27/1110:30DUB - SEA
1 stop33h 00mAmerican Airlines
Mo 1/1211:42SEA - DUB
2 stops21h 23mAmerican Airlines
Deal found 28/10£375
Fr 21/1112:55DUB - SEA
1 stop16h 21mAmerican Airlines
Mo 1/1211:42SEA - DUB
2 stops21h 23mAmerican Airlines
Deal found 28/10£381
Mo 24/1111:30DUB - SEA
1 stop13h 30mIcelandair
Mo 1/1214:35SEA - DUB
1 stop11h 40mIcelandair
Deal found 28/10£383
Sa 22/1111:30DUB - SEA
2 stops31h 14mAmerican Airlines
Sa 29/1113:35SEA - DUB
1 stop12h 15mAmerican Airlines
Deal found 28/10£383
Sa 22/1105:55DUB - SEA
1 stop13h 50mDelta
Sa 29/1106:00SEA - DUB
1 stop17h 45mDelta
Deal found 29/10£385
Sa 22/1105:55DUB - SEA
1 stop13h 50mDelta
Sa 13/1207:20SEA - DUB
1 stop17h 25mDelta
Deal found 28/10£386
Fr 7/1105:55DUB - SEA
1 stop13h 50mDelta
So 23/1106:00SEA - DUB
2 stops22h 40mDelta
Deal found 28/10£386
Mi 5/1105:55DUB - SEA
1 stop13h 50mDelta
Mi 19/1109:43SEA - DUB
2 stops22h 37mDelta
Deal found 28/10£387
Fr 7/1105:55DUB - SEA
2 stops16h 46mDelta
Fr 21/1123:55SEA - DUB
1 stop23h 50mDelta
Deal found 28/10£389

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 30 Oktober 2025.

Round-trip from

£356

One-way from

£343

Popular in

July

Cheapest in

February

Average price

£504

Good one-way deal

£598 or less
Icelandair
  • Icelandair
  • 27/11-4/12
  • 2 total stops
  • 25h 10m total
  • Ireland to Seattle
Search Deals
WestJet
  • WestJet
  • 7/4
  • 2 total stops
  • 58h 49m total
  • Ireland to Seattle
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£101 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 October 2025
Search Deals
Price to beat on a one-way 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 30 Oktober 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

Do 27/11

11:30-17:00

1 stop13h 30m

Seattle/Tacoma Intl

Mo 1/12

14:35-10:15

1 stop11h 40m

£383

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mi 3/12

05:55-20:36

2 stops22h 41m

Seattle/Tacoma Intl

So 14/12

06:00-07:45

1 stop17h 45m

£389

DublinSeattle

DUB - SEA

DUBSEA

Dublin

So 23/11

05:55-18:41

2 stops20h 46m

Seattle/Tacoma Intl

So 7/12

09:45-16:20

2 stops22h 35m

£391

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fr 20/3

05:55-22:16

2 stops23h 21m

Seattle/Tacoma Intl

Fr 3/4

12:00-07:55

1 stop11h 55m

£393

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Do 23/4

20:15-11:35

1 stop23h 20m

Seattle/Tacoma Intl

Sa 2/5

20:20-19:25

1 stop15h 05m

£424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Do 23/4

20:15-11:35

1 stop23h 20m

Seattle/Tacoma Intl

Mi 6/5

20:20-17:30

1 stop13h 10m

£424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mo 27/4

12:45-18:25

1 stop13h 40m

Seattle/Tacoma Intl

So 3/5

13:35-14:15

1 stop16h 40m

£424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Do 23/4

20:15-11:35

1 stop23h 20m

Seattle/Tacoma Intl

Do 30/4

13:35-09:50

1 stop12h 15m

£424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fr 24/4

20:15-11:35

1 stop23h 20m

Seattle/Tacoma Intl

Sa 2/5

13:35-09:35

1 stop12h 00m

£424

DublinSeattle

DUB - SEA

DUBSEA

Dublin

So 26/4

20:25-11:35

1 stop23h 10m

Seattle/Tacoma Intl

Di 5/5

13:35-09:50

1 stop12h 15m

£424

Flights are sorted by cheapest return flights first.

Deals found on 27/10

Showing 1-10 of 23 results
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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
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, March is the cheapest month in which you can book a flight from Ireland to Seattle (average of £363). Flying from Ireland to Seattle in July is currently the most expensive (average of £599). 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 30 Oktober 2025.

A simple way to save on the total cost of your ticket is to fly from Ireland to Seattle in the evening. If you’re flexible enough to do this you can expect to save up to 23% on your trip compared to booking a flight at midday.

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 30 Oktober 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
1,545 reviews
Check prices

Boarding

7.6

Crew

8.0

Overall

7.4

Food

6.6

Entertainment

6.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Scott,Sept 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Scandinavian Airlines
7.4
Good
1,545 reviews
Scandinavian Airlines
7.4
Good
1,545 reviews
Check prices

Boarding

7.6

Crew

8.0

Overall

7.4

Food

6.6

Entertainment

6.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Scott,Sept 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
American Airlines
7.2
Good
11,030 reviews
Scandinavian Airlines
7.4
Good
1,545 reviews
Check prices

Boarding

7.6

Crew

8.0

Overall

7.4

Food

6.6

Entertainment

6.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Scott,Sept 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Aer Lingus
7.2
Good
1,361 reviews
Scandinavian Airlines
7.4
Good
1,545 reviews
Check prices

Boarding

7.6

Crew

8.0

Overall

7.4

Food

6.6

Entertainment

6.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Scott,Sept 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
Icelandair
7.1
Good
562 reviews
Scandinavian Airlines
7.4
Good
1,545 reviews
Check prices

Boarding

7.6

Crew

8.0

Overall

7.4

Food

6.6

Entertainment

6.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Scott,Sept 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.
British Airways
6.7
Okay
7,487 reviews
Scandinavian Airlines
7.4
Good
1,545 reviews
Check prices

Boarding

7.6

Crew

8.0

Overall

7.4

Food

6.6

Entertainment

6.6

Comfort

7.3

Reviews

1 / 20
8.0
Excellent

Scott,Sept 2025

CPH - LAX

Unfortunately, usual rubbish at the gate for SAS reporting that boarding is underway, but clearly that was not the case. Internet worked to start with, but at some point it wouldn't connect using any of the devices I had with me and remained that way for the rest of the trip; could not even blame being out of network coverage, for all of that, as surely it should work across continental USA - worked for so little of the flight for me that I wouldn't have advertised that such a service was actually available; if I had had to pay extra for internet, I would have been demanding that money back.

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 81 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 £383. Ireland and Seattle are separated by a distance of 4523 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Ireland to Seattle one-way?

    The cheapest airline one-way is WestJet, with whom users have recently found tickets for as low as £343. However, be on the lookout for offers from Aer Lingus and Icelandair, as they are both options that can get you from Ireland to Seattle for a low price.

  • 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: Aer Lingus (87%), British Airways (75%), American Airlines( 75%).

  • What are the cheapest flights from Ireland to Seattle?

    The cheapest flight price from Ireland to Seattle is £562. On average you can expect to pay £785. The most popular route, (Dublin - Seattle/Tacoma Intl), can usually be booked for £357.

  • 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, March is the cheapest month in which you can book a flight from Ireland to Seattle (average of £363). Flying from Ireland to Seattle in July is currently the most expensive (average of £599). 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

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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 30 Oktober 2025.
AirlineCheapestAverageFlexibilityOn-time
Scandinavian AirlinesCheapest£325Average£429FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
British AirwaysCheapest£354Average£473FlexibilityNo cancel feeOn-time70%
Search British Airways flights
Aer LingusCheapest£402Average£579FlexibilityNo cancel feeOn-timeN/A
Search Aer Lingus flights
IcelandairCheapest£420Average£504FlexibilityNo cancel feeOn-time76%
Search Icelandair flights
American AirlinesCheapest£556Average£678FlexibilityNo 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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