Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Ireland to Seattle from $361

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 9/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Ireland to Seattle

Recent round-trip flight deals from Ireland to Seattle

Scandinavian Airlines Logo
12:40 pm - 1:50 pmDUB-SEA
33h 10m1 stop
Scandinavian Airlines Logo
4:20 pm - 11:50 amSEA-DUB
35h 30m1 stop
$404Scandinavian Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 21
Scandinavian Airlines Logo
12:40 pm - 1:50 pmDUB-SEA
33h 10m1 stop
Scandinavian Airlines Logo
4:20 pm - 11:50 amSEA-DUB
35h 30m1 stop
$416Scandinavian Airlines
Find Deal
Fri, Sep 5 - Sun, Sep 21
Icelandair Logo
2:15 pm - 5:50 pmDUB-SEA
11h 35m1 stop
Icelandair Logo
3:45 pm - 11:05 amSEA-DUB
11h 20m1 stop
$443Icelandair
Find Deal
Thu, Sep 4 - Thu, Sep 18
Icelandair Logo
2:15 pm - 5:50 pmDUB-SEA
11h 35m1 stop
Icelandair Logo
7:00 pm - 11:05 amSEA-DUB
32h 05m1 stop
$449Icelandair
Find Deal
Mon, Sep 8 - Wed, Sep 24
Aer Lingus Logo
4:10 pm - 5:50 pmDUB-SEA
9h 40mnonstop
Aer Lingus Logo
7:35 pm - 12:40 pmSEA-DUB
9h 05mnonstop
$506Aer Lingus
Find Deal
Thu, Sep 4 - Thu, Sep 18
Aer Lingus Logo
4:10 pm - 5:50 pmDUB-SEA
9h 40mnonstop
Aer Lingus Logo
7:35 pm - 12:40 pmSEA-DUB
9h 05mnonstop
$509Aer Lingus
Find Deal
Thu, Sep 4 - Thu, Sep 18
Logo
8:55 am - 4:05 pmDUB-SEA
15h 10m1 stop
Logo
1:30 pm - 3:00 pmSEA-DUB
17h 30m1 stop
$523
Find Deal
Mon, Sep 8 - Wed, Sep 24
Logo
5:55 am - 11:45 amDUB-SEA
13h 50m1 stop
Logo
7:25 am - 8:45 amSEA-DUB
17h 20m1 stop
$526
Find Deal
Fri, Sep 5 - Sun, Sep 21
American Airlines Logo
7:50 am - 4:55 pmSNN-SEA
17h 05m1 stop
American Airlines Logo
1:35 pm - 11:30 amSEA-SNN
37h 55m2 stops
$832American Airlines
Find Deal
Sat, Nov 15 - Tue, Nov 18
American Airlines Logo
7:50 am - 11:18 pmSNN-SEA
23h 28m2 stops
American Airlines Logo
9:00 am - 11:30 amSEA-SNN
18h 30m2 stops
$838American Airlines
Find Deal
Sat, Nov 15 - Tue, Nov 18

Aer Lingus flights from Ireland to Seattle

Our best Aer Lingus deals on Ireland to Seattle flight tickets
Aer Lingus
Sep 4
DUB4:10 pmDublin
9h 40m
SEA5:50 pmSeattle/Tacoma Intl
Sep 18
SEA7:35 pmSeattle/Tacoma Intl
9h 05m
DUB12:40 pmDublin
$506
Find similar
Aer Lingus
Sep 4
DUB4:10 pmDublin
9h 40m
SEA5:50 pmSeattle/Tacoma Intl
Sep 18
SEA7:35 pmSeattle/Tacoma Intl
9h 05m
DUB12:40 pmDublin
$509
Find similar
Aer Lingus
Sep 4
DUB4:10 pmDublin
9h 40m
SEA5:50 pmSeattle/Tacoma Intl
Sep 18
SEA7:35 pmSeattle/Tacoma Intl
9h 05m
DUB12:40 pmDublin
$515
Find similar

American Airlines flights from Ireland to Seattle

Our best American Airlines deals on Ireland to Seattle flight tickets
American Airlines
Nov 15
SNN7:50 amShannon
17h 05m
1 stop
SEA4:55 pmSeattle/Tacoma Intl
Nov 18
SEA1:35 pmSeattle/Tacoma Intl
37h 55m
2 stops
SNN11:30 amShannon
$832
Find similar
American Airlines
Nov 15
SNN7:50 amShannon
23h 28m
2 stops
SEA11:18 pmSeattle/Tacoma Intl
Nov 18
SEA9:00 amSeattle/Tacoma Intl
18h 30m
2 stops
SNN11:30 amShannon
$838
Find similar
American Airlines
Nov 15
SNN7:50 amShannon
23h 28m
2 stops
SEA11:18 pmSeattle/Tacoma Intl
Nov 18
SEA9:00 amSeattle/Tacoma Intl
18h 30m
2 stops
SNN11:30 amShannon
$842
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 August 7, 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

Fri 9/5

12:40 pm-1:50 pm

1 stop33h 10m

Seattle/Tacoma Intl

Sun 9/21

4:20 pm-11:50 am

1 stop35h 30m

$404

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 9/5

12:40 pm-1:50 pm

1 stop33h 10m

Seattle/Tacoma Intl

Sun 9/21

4:20 pm-11:50 am

1 stop35h 30m

$416

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/4

2:15 pm-5:50 pm

1 stop11h 35m

Seattle/Tacoma Intl

Thu 9/18

3:45 pm-11:05 am

1 stop11h 20m

$443

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 9/8

2:15 pm-5:50 pm

1 stop11h 35m

Seattle/Tacoma Intl

Wed 9/24

7:00 pm-11:05 am

1 stop32h 05m

$449

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/4

4:10 pm-5:50 pm

Nonstop9h 40m

Seattle/Tacoma Intl

Thu 9/18

7:35 pm-12:40 pm

Nonstop9h 05m

$506

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Thu 9/4

4:10 pm-5:50 pm

Nonstop9h 40m

Seattle/Tacoma Intl

Thu 9/18

7:35 pm-12:40 pm

Nonstop9h 05m

$509

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Mon 9/8

8:55 am-4:05 pm

1 stop15h 10m

Seattle/Tacoma Intl

Wed 9/24

1:30 pm-3:00 pm

1 stop17h 30m

$523

DublinSeattle

DUB - SEA

DUBSEA

Dublin

Fri 9/5

5:55 am-11:45 am

1 stop13h 50m

Seattle/Tacoma Intl

Sun 9/21

7:25 am-8:45 am

1 stop17h 20m

$526

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Sat 11/15

7:50 am-4:55 pm

1 stop17h 05m

Seattle/Tacoma Intl

Tue 11/18

1:35 pm-11:30 am

2 stops37h 55m

$832

ShannonSeattle

SNN - SEA

SNNSEA

Shannon

Sat 11/15

7:50 am-11:18 pm

2 stops23h 28m

Seattle/Tacoma Intl

Tue 11/18

9:00 am-11:30 am

2 stops18h 30m

$838

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 $608. If you don’t want to visit Seattle in February, then you should wait until January 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, Saturday 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 $883.

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 $826. 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 $733 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 $688 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 5% 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

$361

Fastest flight time

9h 40m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Ireland in the past 72 hours is $361. The best round-trip flight deal from Ireland to Seattle found on momondo in the last 72 hours is $404.
The fastest flight from Ireland to Seattle takes 9h 40m
Direct flights go from Ireland to Seattle every day.
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
IcelandairPriceFrom $458Free CancellationRating
7.0
524 reviews
Search Icelandair flights
Aer LingusPriceFrom $605Free CancellationRating
7.1
1,202 reviews
Search Aer Lingus flights
American AirlinesPriceFrom $684Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights

Traveling to a place near Seattle?

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

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.

An easier way to manage your Seattle trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Tue 8/12
Tue 8/19
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to the United States