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Cheap flights from Seattle to Ireland from $303

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Ireland departing on 3/16. 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

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Find the cheapest flights from Seattle to Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
3:40 pm - 11:05 am
SEA
-
DUB
11h 25m1 stop
Icelandair Logo
2:15 pm - 5:55 pm
DUB
-
SEA
11h 40m1 stop
$402Icelandair
Tue, Apr 21 - Tue, May 5
Icelandair Logo
3:40 pm - 11:05 am
SEA
-
DUB
11h 25m1 stop
Icelandair Logo
2:15 pm - 8:40 pm
DUB
-
SEA
14h 25m1 stop
$404Icelandair
Thu, May 14 - Sat, May 23
Icelandair Logo
7:00 pm - 11:05 am
SEA
-
DUB
32h 05m1 stop
Icelandair Logo
12:15 pm - 8:40 pm
DUB
-
SEA
16h 25m1 stop
$406Icelandair
Wed, May 13 - Wed, May 27
Icelandair Logo
2:35 pm - 10:15 am
SEA
-
DUB
11h 40m1 stop
Icelandair Logo
11:30 am - 5:00 pm
DUB
-
SEA
13h 30m1 stop
$407Icelandair
Sun, Jan 18 - Wed, Feb 11
American Airlines Logo
6:50 pm - 4:45 pm
SEA
-
SNN
13h 55m1 stop
American Airlines Logo
7:50 am - 4:55 pm
SNN
-
SEA
17h 05m1 stop
$470American Airlines
Thu, Jan 22 - Thu, Jan 29
American Airlines Logo
2:10 pm - 4:45 pm
SEA
-
SNN
18h 35m2 stops
American Airlines Logo
7:50 am - 4:55 pm
SNN
-
SEA
17h 05m1 stop
$474American Airlines
Thu, Jan 22 - Thu, Jan 29
United Airlines Logo
12:25 pm - 10:15 am
SEA
-
SNN
13h 50m1 stop
United Airlines Logo
12:30 pm - 10:59 pm
SNN
-
SEA
18h 29m2 stops
$492United Airlines
Wed, Apr 22 - Fri, May 1
Delta Logo
2:10 pm - 3:00 pm
SEA
-
ORK
16h 50m1 stop
Delta Logo
11:15 am - 12:35 pm
ORK
-
SEA
32h 20m1 stop
$495Delta
Mon, Mar 2 - Thu, Mar 12
Delta Logo
5:30 am - 11:25 pm
SEA
-
ORK
33h 55m2 stops
Delta Logo
11:15 am - 12:35 pm
ORK
-
SEA
32h 20m1 stop
$505Delta
Mon, Mar 2 - Tue, Mar 10
British Airways Logo
6:50 pm - 4:45 pm
SEA
-
SNN
13h 55m1 stop
British Airways Logo
7:50 am - 5:55 pm
SNN
-
SEA
17h 05m1 stop
$650British Airways
Tue, Mar 3 - Wed, Mar 11

Lufthansa flights from Seattle to Ireland

Our best Lufthansa deals on Seattle to Ireland flight tickets
Lufthansa
Feb 3
SEA7:00 amSeattle/Tacoma Intl
17h 10m
1 stop
DUB8:10 amDublin
Feb 11
DUB10:40 amDublin
15h 34m
1 stop
SEA6:14 pmSeattle/Tacoma Intl
$447
Find similar
Lufthansa
Feb 2
SEA2:10 pmSeattle/Tacoma Intl
34h 00m
1 stop
DUB8:10 amDublin
Feb 13
DUB9:00 amDublin
42h 16m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$476
Find similar
Lufthansa
Apr 20
SEA2:16 pmSeattle/Tacoma Intl
35h 29m
1 stop
DUB9:45 amDublin
May 8
DUB9:50 amDublin
36h 26m
2 stops
SEA2:16 pmSeattle/Tacoma Intl
$481
Find similar

Delta flights from Seattle to Ireland

Our best Delta deals on Seattle to Ireland flight tickets
Delta
Feb 4
SEA2:15 pmSeattle/Tacoma Intl
17h 30m
1 stop
DUB3:45 pmDublin
Feb 13
DUB5:55 amDublin
13h 45m
1 stop
SEA11:40 amSeattle/Tacoma Intl
$492
Find similar
Delta
Mar 2
SEA2:10 pmSeattle/Tacoma Intl
16h 50m
1 stop
ORK3:00 pmCork
Mar 10
ORK6:00 amCork
13h 35m
1 stop
SEA12:35 pmSeattle/Tacoma Intl
$495
Find similar
Delta
Mar 2
SEA2:10 pmSeattle/Tacoma Intl
16h 50m
1 stop
ORK3:00 pmCork
Mar 12
ORK5:15 pmCork
37h 46m
2 stops
SEA12:01 amSeattle/Tacoma Intl
$505
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Ireland 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 December 8, 2025.
Use the filters below to find and compare flights from Seattle to Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Tue 4/21

3:40 pm-11:05 am

1 stop11h 25m

Dublin

Tue 5/5

2:15 pm-5:55 pm

1 stop11h 40m

$402

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 5/14

3:40 pm-11:05 am

1 stop11h 25m

Dublin

Sat 5/23

2:15 pm-8:40 pm

1 stop14h 25m

$404

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 5/13

7:00 pm-11:05 am

1 stop32h 05m

Dublin

Wed 5/27

12:15 pm-8:40 pm

1 stop16h 25m

$406

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 1/18

2:35 pm-10:15 am

1 stop11h 40m

Dublin

Wed 2/11

11:30 am-5:00 pm

1 stop13h 30m

$407

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 1/22

6:50 pm-4:45 pm

1 stop13h 55m

Shannon

Thu 1/29

7:50 am-4:55 pm

1 stop17h 05m

$470

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Thu 1/22

2:10 pm-4:45 pm

2 stops18h 35m

Shannon

Thu 1/29

7:50 am-4:55 pm

1 stop17h 05m

$474

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 4/22

12:25 pm-10:15 am

1 stop13h 50m

Shannon

Fri 5/1

12:30 pm-10:59 pm

2 stops18h 29m

$492

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Mon 3/2

2:10 pm-3:00 pm

1 stop16h 50m

Cork

Thu 3/12

11:15 am-12:35 pm

1 stop32h 20m

$495

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Mon 3/2

5:30 am-11:25 pm

2 stops33h 55m

Cork

Tue 3/10

11:15 am-12:35 pm

1 stop32h 20m

$505

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 3/3

6:50 pm-4:45 pm

1 stop13h 55m

Shannon

Wed 3/11

7:50 am-5:55 pm

1 stop17h 05m

$650

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 Ireland from

How to get the cheapest flight ticket from Seattle to Ireland

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 Ireland?

In general, November is the cheapest month to fly from Seattle to Ireland. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $472. If you aren’t able to travel to Ireland during the month of November, then flying in January is also cheap. Prices for this month can be found on momondo for an average of $549.

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

The cheapest day to depart on your flight to Ireland is on a Tuesday when prices can be found for as low as $738. This is often the case because there is less demand to fly during this day of the week. Flights from Seattle to Ireland on a Saturday will generally be more expensive and average around $916. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

According to our data, the cheapest time of day to fly to Ireland is at noon. momondo users have found flights departing from Seattle to Ireland at noon for as low as $610. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. In contrast, the most expensive time of day to depart to Ireland is in the afternoon when prices are around $899.

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

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

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

You are more likely to see cheaper flights to Ireland from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around $656 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from Seattle for as low as $594 on momondo.

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

There are 2 cabin classes available to choose from on Seattle/Tacoma Intl to Ireland 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 Seattle to Ireland flights?

You could potentially save up to 50% on your flight if you consider stops on a Seattle to Ireland flight.

Cheap Seattle to Ireland flight deals and tips

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

Best Price Found

$435

Fastest flight time

9h 00m

Direct flights

Every day

Airports in Ireland

1 airport
The best one-way flight to Ireland from Seattle in the past 72 hours is $435. The best round-trip flight deal from Seattle to Ireland found on momondo in the last 72 hours is $562.
The fastest flight from Seattle to Ireland takes 9h 00m
Direct flights go from Seattle to Ireland every day.
There is 1 airport near Ireland: Dublin (DUB)
Search flight deals

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

    Prices for flights from Seattle/Tacoma Intl Airport to Ireland are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Ireland.

  • What documentation or ID do you need to fly to Ireland?

    The travel and health documents you'll need for your trip to Ireland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Ireland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Best airlines flying from Seattle to Ireland

Compare and see reviews for airlines that fly from Seattle to Ireland with momondo
Airline
Rating
Free Cancellation
Price
JetBluePriceFrom $101Free CancellationRating
7.2
2,899 reviews
Search JetBlue flights
Air CanadaPriceFrom $341Free CancellationRating
7.1
10,514 reviews
Search Air Canada flights
IcelandairPriceFrom $358Free CancellationRating
7.0
588 reviews
Search Icelandair flights
IberiaPriceFrom $367Free CancellationRating
7.0
3,043 reviews
Search Iberia flights
KLMPriceFrom $405Free CancellationRating
7.7
1,431 reviews
Search KLM flights
Aer LingusPriceFrom $412Free CancellationRating
7.2
1,389 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $418Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
United AirlinesPriceFrom $431Free CancellationRating
7.4
9,089 reviews
Search United Airlines flights
Scandinavian AirlinesPriceFrom $444Free CancellationRating
7.4
1,602 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $467Free CancellationRating
6.8
7,618 reviews
Search Lufthansa flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Ireland. Millions of users trust and use momondo every year so you are in good hands.

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

Yes. All flights to Ireland from Seattle on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Ireland from Seattle.

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

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

An easier way to manage your Ireland 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.
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Find better results for your trip to Ireland

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