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Cheap flights from Ireland to Seattle from $352

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ireland to Seattle departing on 5/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Ireland to Seattle

Recent round-trip flight deals from Ireland to Seattle

Enter your travel dates to find the best prices.
Icelandair Logo
11:30 am - 5:00 pmDUB-SEA
13h 30m1 stop
Icelandair Logo
2:35 pm - 10:15 amSEA-DUB
11h 40m1 stop
$465Icelandair
Find Deal
mié., feb. 18 - sáb., feb. 28
Icelandair Logo
11:30 am - 5:00 pmDUB-SEA
13h 30m1 stop
Icelandair Logo
2:35 pm - 10:15 amSEA-DUB
11h 40m1 stop
$466Icelandair
Find Deal
mié., nov. 19 - mié., dic. 3
KLM Logo
5:55 am - 11:45 amDUB-SEA
13h 50m1 stop
KLM Logo
11:30 am - 8:45 amSEA-DUB
13h 15m1 stop
$486KLM
Find Deal
vie., nov. 21 - vie., dic. 5
KLM Logo
5:55 am - 11:45 amDUB-SEA
13h 50m1 stop
KLM Logo
9:45 am - 12:40 pmSEA-DUB
18h 55m2 stops
$488KLM
Find Deal
vie., nov. 21 - vie., dic. 5
American Airlines Logo
8:50 am - 4:55 pmDUB-SEA
16h 05m1 stop
American Airlines Logo
1:35 pm - 3:00 pmSEA-DUB
17h 25m1 stop
$490American Airlines
Find Deal
mié., ene. 28 - sáb., feb. 7
American Airlines Logo
10:20 am - 4:55 pmDUB-SEA
14h 35m1 stop
American Airlines Logo
1:35 pm - 10:00 amSEA-DUB
12h 25m1 stop
$491American Airlines
Find Deal
mié., feb. 18 - vie., feb. 27
Aer Lingus Logo
4:30 pm - 6:20 pmDUB-SEA
9h 50mnonstop
Aer Lingus Logo
8:05 pm - 1:10 pmSEA-DUB
9h 05mnonstop
$501Aer Lingus
Find Deal
vie., nov. 21 - vie., dic. 5
Delta Logo
5:55 am - 11:45 amDUB-SEA
13h 50m1 stop
Delta Logo
7:30 am - 9:20 amSEA-DUB
17h 50m1 stop
$503Delta
Find Deal
vie., nov. 21 - mar., nov. 25
Delta Logo
5:55 am - 11:50 amDUB-SEA
13h 55m1 stop
Delta Logo
7:15 am - 12:40 pmSEA-DUB
21h 25m2 stops
$505Delta
Find Deal
lun., dic. 8 - dom., dic. 14
Aer Lingus Logo
4:30 pm - 7:20 pmDUB-SEA
9h 50mnonstop
Aer Lingus Logo
7:50 pm - 5:45 pmSEA-DUB
14h 55m1 stop
$562Aer Lingus
Find Deal
vie., mar. 13 - dom., mar. 22

British Airways flights from Ireland to Seattle

Our best British Airways deals on Ireland to Seattle flight tickets
British Airways
Jan 28
DUB8:50 amDublin
20h 57m
2 stops
SEA9:47 pmSeattle/Tacoma Intl
Feb 7
SEA1:35 pmSeattle/Tacoma Intl
15h 10m
1 stop
DUB12:45 pmDublin
$504
Find similar
British Airways
Dec 2
DUB11:30 amDublin
18h 40m
1 stop
SEA10:10 pmSeattle/Tacoma Intl
Dec 6
SEA12:31 amSeattle/Tacoma Intl
22h 39m
1 stop
DUB7:10 amDublin
$574
Find similar
British Airways
Nov 16
DUB11:30 amDublin
18h 50m
1 stop
SEA10:20 pmSeattle/Tacoma Intl
Nov 29
SEA12:59 amSeattle/Tacoma Intl
22h 11m
1 stop
DUB7:10 amDublin
$576
Find similar

Icelandair flights from Ireland to Seattle

Our best Icelandair deals on Ireland to Seattle flight tickets
Icelandair
Feb 18
DUB11:30 amDublin
13h 30m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
Feb 28
SEA2:35 pmSeattle/Tacoma Intl
11h 40m
1 stop
DUB10:15 amDublin
$465
Find similar
Icelandair
Nov 19
DUB11:30 amDublin
13h 30m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
Dec 3
SEA2:35 pmSeattle/Tacoma Intl
11h 40m
1 stop
DUB10:15 amDublin
$466
Find similar
Icelandair
Jan 28
DUB11:30 amDublin
13h 30m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
Feb 7
SEA2:35 pmSeattle/Tacoma Intl
11h 40m
1 stop
DUB10:15 amDublin
$469
Find similar

momondo Fare Finder

 
Customize 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, momondo users made 832,500 searches. Data last updated noviembre 6, 2025.
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

DublinSeattle

DUB - SEA

DUBSEA

Dublin

mié. 2/18

11:30 am-5:00 pm

1 stop13h 30m

Seattle/Tacoma Intl

sáb. 2/28

2:35 pm-10:15 am

1 stop11h 40m

$465

DublinSeattle

DUB - SEA

DUBSEA

Dublin

mié. 11/19

11:30 am-5:00 pm

1 stop13h 30m

Seattle/Tacoma Intl

mié. 12/3

2:35 pm-10:15 am

1 stop11h 40m

$466

DublinSeattle

DUB - SEA

DUBSEA

Dublin

vie. 11/21

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

vie. 12/5

11:30 am-8:45 am

1 stop13h 15m

$486

DublinSeattle

DUB - SEA

DUBSEA

Dublin

vie. 11/21

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

vie. 12/5

9:45 am-12:40 pm

2 stops18h 55m

$488

DublinSeattle

DUB - SEA

DUBSEA

Dublin

mié. 1/28

8:50 am-4:55 pm

1 stop16h 05m

Seattle/Tacoma Intl

sáb. 2/7

1:35 pm-3:00 pm

1 stop17h 25m

$490

DublinSeattle

DUB - SEA

DUBSEA

Dublin

mié. 2/18

10:20 am-4:55 pm

1 stop14h 35m

Seattle/Tacoma Intl

vie. 2/27

1:35 pm-10:00 am

1 stop12h 25m

$491

DublinSeattle

DUB - SEA

DUBSEA

Dublin

vie. 11/21

4:30 pm-6:20 pm

Nonstop9h 50m

Seattle/Tacoma Intl

vie. 12/5

8:05 pm-1:10 pm

Nonstop9h 05m

$501

DublinSeattle

DUB - SEA

DUBSEA

Dublin

vie. 11/21

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

mar. 11/25

7:30 am-9:20 am

1 stop17h 50m

$503

DublinSeattle

DUB - SEA

DUBSEA

Dublin

lun. 12/8

5:55 am-11:50 am

1 stop13h 55m

Seattle/Tacoma Intl

dom. 12/14

7:15 am-12:40 pm

2 stops21h 25m

$505

DublinSeattle

DUB - SEA

DUBSEA

Dublin

vie. 3/13

4:30 pm-7:20 pm

Nonstop9h 50m

Seattle/Tacoma Intl

dom. 3/22

7:50 pm-5:45 pm

1 stop14h 55m

$562

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Ireland to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, February is the cheapest month to fly from Ireland to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $613. If you don’t want to visit Seattle in February, then you should wait until November to fly from Ireland, when ticket prices are also cheap, with an average price of $633.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Ireland is on a Sunday. momondo users have found tickets for Sunday departures for as low as $635. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Thursday is the most expensive day to depart from Ireland because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $997.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Ireland in the morning is the least expensive time of day to depart. momondo users have found prices as low as $750 when looking at flights departing in the morning. Flights to Seattle are more costly in the afternoon, with an average ticket price of $771. Departure times in the afternoon fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Ireland to Seattle/Tacoma Intl flight route?

Fly from Dublin to Seattle/Tacoma Intl for the best Ireland - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $714 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as $600 on momondo.

What cabin class options are available on Ireland to Seattle/Tacoma Intl flights?

There are 3 cabin classes available to choose from on Ireland to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Ireland to Seattle flights?

You could potentially save up to 25% on your flight if you consider stops on a Ireland to Seattle flight.

Cheap Ireland to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Ireland to Seattle

Best Price Found

$643

Fastest flight time

9h 39m

Direct flights

Mon, Tue, Wed, Thu, Fri and Sat

Airports in Seattle

1 airport
The best one-way flight to Seattle from Ireland in the past 72 hours is $643. The best round-trip flight deal from Ireland to Seattle found on momondo in the last 72 hours is $562.
The fastest flight from Ireland to Seattle takes 9h 39m
Direct flights go from Ireland to Seattle on Monday, Tuesday, Wednesday, Thursday, Friday and Saturday. There are no airlines offering direct flights.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • When did momondo last update prices for flights from Ireland to Seattle/Tacoma Intl Airport?

    Prices for flights from Ireland to Seattle/Tacoma Intl Airport were last updated today.

  • How many operators does momondo search for flights from Ireland to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Ireland to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Ireland to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents required for your trip to Seattle/Tacoma Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Seattle/Tacoma Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular plane model from Ireland to Seattle?

Best airlines flying from Ireland to Seattle

Compare and see reviews for airlines that fly from Ireland to Seattle with momondo
Airline
Rating
Free Cancellation
Price
Aer LingusPriceFrom $525Free CancellationRating
7.2
1,365 reviews
Search Aer Lingus flights
IcelandairPriceFrom $556Free CancellationRating
7.1
572 reviews
Search Icelandair flights
American AirlinesPriceFrom $640Free CancellationRating
7.2
11,040 reviews
Search American Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Puyallup
Marysville
Redmond
Tukwila
Lakewood
Federal Way
Fife
Cle Elum
Centralia
Kirkland
Westport
Shoreline

Why use momondo?

Why should I use momondo to find a flight deal from Ireland to Seattle?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Seattle from Ireland.

Can I find flights from Ireland to Seattle with flexible booking policies on momondo?

Flights from Ireland to Seattle with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Ireland to Seattle?

momondo provides multiple filters to help you find the best flight to Seattle from Ireland. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Ireland to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Ireland and alert you when they change.

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