What is the cheapest airline that flies from Seattle/Tacoma Intl to Ireland?

Aer Lingus and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Ireland

What airlines fly to Ireland?

Aer Lingus, Icelandair and American Airlines are the top three most popular airlines that fly to Ireland from Seattle according to our data. Aer Lingus is the first choice among our users, with 68% of people opting to fly with this airline when traveling to Ireland. Keep in mind that there are 12 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

How many flights depart from Seattle to Ireland on average per week?

16 flights are operational weekly from Seattle to Ireland as of February 2026. The most popular departure day for this route is Mon, with 25% of flights per week taking off on this day.

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?

As of February 2026, there are 12 operators available to choose from 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.

$223 Cheap Flights from Seattle to Ireland in 2026

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Find the cheapest flights from Seattle to Ireland

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

3:55 pm - 9:25 am

SEA

DUB

33h 30m

1 stop

12:40 pm - 1:45 pm

DUB

SEA

33h 05m

1 stop

$503Scandinavian Airlines

Fri, Aug 14 - Mon, Sep 7

3:55 pm - 10:55 am

SEA

DUB

35h 00m

2 stops

8:00 pm - 1:45 pm

DUB

SEA

25h 45m

2 stops

$504Scandinavian Airlines

Sun, Aug 16 - Sat, Aug 22

12:08 pm - 10:15 am

SEA

SNN

14h 07m

1 stop

12:30 pm - 11:27 pm

SNN

SEA

18h 57m

2 stops

$523United Airlines

Tue, Apr 7 - Wed, Apr 29

5:00 am - 10:15 am

SEA

SNN

21h 15m

2 stops

12:30 pm - 11:27 pm

SNN

SEA

18h 57m

2 stops

$543United Airlines

Tue, Apr 14 - Sat, Apr 25

9:05 pm - 7:25 pm

SEA

SNN

15h 20m

2 stops

7:50 am - 7:20 pm

SNN

SEA

42h 30m

2 stops

$637Aer Lingus

Wed, Mar 11 - Tue, Mar 17

7:15 am - 10:20 am

SEA

ORK

19h 05m

2 stops

6:15 am - 11:42 am

ORK

SEA

13h 27m

1 stop

$654Delta

Sun, Apr 26 - Tue, May 5

6:00 am - 10:20 am

SEA

ORK

20h 20m

2 stops

6:15 am - 11:45 am

ORK

SEA

13h 30m

1 stop

$655Delta

Mon, Mar 30 - Tue, Apr 7

9:05 pm - 7:25 pm

SEA

SNN

15h 20m

2 stops

7:50 am - 7:20 pm

SNN

SEA

18h 30m

2 stops

$657Aer Lingus

Wed, Mar 18 - Wed, Mar 25

2:10 pm - 4:30 pm

SEA

ORK

18h 20m

1 stop

5:10 pm - 12:20 pm

ORK

SEA

27h 10m

1 stop

$678Lufthansa

Sun, Apr 5 - Sun, Apr 12

2:10 pm - 4:30 pm

SEA

ORK

18h 20m

1 stop

5:10 pm - 7:00 pm

ORK

SEA

33h 50m

2 stops

$739Lufthansa

Sun, Apr 5 - Sun, Apr 12

Icelandair flights from Seattle to Ireland

Our best Icelandair deals on Seattle to Ireland flight tickets

Icelandair

Apr 16

SEA3:40 pmSeattle/Tacoma Intl

11h 25m

1 stop

DUB11:05 amDublin

Apr 21

DUB2:15 pmDublin

14h 25m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

$567

Icelandair

Apr 19

SEA3:40 pmSeattle/Tacoma Intl

13h 35m

1 stop

DUB1:15 pmDublin

Apr 30

DUB2:15 pmDublin

11h 40m

1 stop

SEA5:55 pmSeattle/Tacoma Intl

$571

Icelandair

Apr 29

SEA3:40 pmSeattle/Tacoma Intl

13h 35m

1 stop

DUB1:15 pmDublin

May 10

DUB12:15 pmDublin

16h 25m

1 stop

SEA8:40 pmSeattle/Tacoma Intl

$577

Scandinavian Airlines flights from Seattle to Ireland

Our best Scandinavian Airlines deals on Seattle to Ireland flight tickets

Scandinavian Airlines

Mar 3

SEA7:10 amSeattle/Tacoma Intl

27h 10m

2 stops

DUB6:20 pmDublin

Mar 6

DUB7:05 pmDublin

34h 47m

2 stops

SEA9:52 pmSeattle/Tacoma Intl

$666

Scandinavian Airlines

Apr 10

SEA1:45 pmSeattle/Tacoma Intl

12h 35m

1 stop

ORK10:20 amCork

Apr 17

ORK6:15 amCork

18h 15m

1 stop

SEA4:30 pmSeattle/Tacoma Intl

$905

Fly from

Fly to

Route

Depart

Return

Price

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Fri 8/14

3:55 pm-9:25 am

1 stop33h 30m

Dublin

Mon 9/7

12:40 pm-1:45 pm

1 stop33h 05m

$503

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sun 8/16

3:55 pm-10:55 am

2 stops35h 00m

Dublin

Sat 8/22

8:00 pm-1:45 pm

2 stops25h 45m

$504

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 4/7

12:08 pm-10:15 am

1 stop14h 07m

Shannon

Wed 4/29

12:30 pm-11:27 pm

2 stops18h 57m

$523

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Tue 4/14

5:00 am-10:15 am

2 stops21h 15m

Shannon

Sat 4/25

12:30 pm-11:27 pm

2 stops18h 57m

$543

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 3/11

9:05 pm-7:25 pm

2 stops15h 20m

Shannon

Tue 3/17

7:50 am-7:20 pm

2 stops42h 30m

$637

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Sun 4/26

7:15 am-10:20 am

2 stops19h 05m

Cork

Tue 5/5

6:15 am-11:42 am

1 stop13h 27m

$654

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Mon 3/30

6:00 am-10:20 am

2 stops20h 20m

Cork

Tue 4/7

6:15 am-11:45 am

1 stop13h 30m

$655

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Wed 3/18

9:05 pm-7:25 pm

2 stops15h 20m

Shannon

Wed 3/25

7:50 am-7:20 pm

2 stops18h 30m

$657

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Sun 4/5

2:10 pm-4:30 pm

1 stop18h 20m

Cork

Sun 4/12

5:10 pm-12:20 pm

1 stop27h 10m

$678

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Sun 4/5

2:10 pm-4:30 pm

1 stop18h 20m

Cork

Sun 4/12

5:10 pm-7:00 pm

2 stops33h 50m

$739

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

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

Prices

Airlines

Other information

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 $468. 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 $486.

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 $698. 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 $883. 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 in the evening. momondo users have found flights departing from Seattle to Ireland in the evening for as low as $662. 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 $839.

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 $634 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 $565 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 15% 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	$340
Fastest flight time	9h 05m
Direct flights	Every day
Airports in Ireland	77 airports

The best one-way flight to Ireland from Seattle in the past 72 hours is $340. The best round-trip flight deal from Seattle to Ireland found on momondo in the last 72 hours is $651.

The fastest flight from Seattle to Ireland takes 9h 05m

Direct flights go from Seattle to Ireland every day.

There are 77 airports in Ireland. From Seattle there are direct flights to 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?
As of February 2026, there are 12 operators available to choose from 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?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from Seattle to Ireland is Airbus A330-200 (63.73% of total bookings). The next most popular plane models are Airbus A330-900neo (10.59%), Boeing 787-10 Dreamliner (5.69%), and Boeing 787-9 Dreamliner (4.79%).

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
JetBlue	PriceFrom $101	Free Cancellation	Rating 7.2 2,898 reviews	Search JetBlue flights
Air Canada	PriceFrom $341	Free Cancellation	Rating 7.1 10,738 reviews	Search Air Canada flights
Icelandair	PriceFrom $350	Free Cancellation	Rating 7.1 617 reviews	Search Icelandair flights
Iberia	PriceFrom $367	Free Cancellation	Rating 7.0 3,120 reviews	Search Iberia flights
Aer Lingus	PriceFrom $399	Free Cancellation	Rating 7.2 1,460 reviews	Search Aer Lingus flights
KLM	PriceFrom $405	Free Cancellation	Rating 7.7 1,457 reviews	Search KLM flights
British Airways	PriceFrom $407	Free Cancellation	Rating 6.7 7,757 reviews	Search British Airways flights
United Airlines	PriceFrom $431	Free Cancellation	Rating 7.4 9,339 reviews	Search United Airlines flights
Scandinavian Airlines	PriceFrom $444	Free Cancellation	Rating 7.3 1,695 reviews	Search Scandinavian Airlines flights
Lufthansa	PriceFrom $457	Free Cancellation	Rating 6.8 7,802 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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Popular cities in Ireland

Flights to Dublinfrom $296

Flights to Shannon, Clarefrom $346

Flights to Corkfrom $394

Flights to Milltown (Kerry)from $521

Flights to Knockfrom $609

Flights to Donegalfrom $711

Cheap flights from Seattle to Ireland from $223

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 4/18. 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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Icelandair flights from Seattle to Ireland

Our best Icelandair deals on Seattle to Ireland flight tickets

Scandinavian Airlines flights from Seattle to Ireland

Our best Scandinavian Airlines deals on Seattle to Ireland flight tickets

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See travel insights to Ireland from

How to get the cheapest flight ticket from Seattle to Ireland

What is the cheapest month to fly to Ireland?

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

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

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

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

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

Can stopping save me money on Seattle to Ireland flights?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Ireland?

What airlines fly to Ireland?

How many flights depart from Seattle to Ireland on average per week?

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

Fastest flight time

Direct flights

Airports in Ireland

Best airlines flying from Seattle to Ireland

Compare and see reviews for airlines that fly from Seattle to Ireland with momondo

Why use momondo?

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

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

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

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

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Ireland

Popular cities in Ireland

Popular flights according to clicks in the last 7 days on momondo

Seattle flight routes

According to popular flight searches on momondo this year

Ireland flight routes

According to popular flight searches on momondo this year

Fly your favorite airline to Ireland

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

Cabin classes currently available on flights to Ireland

List of cabin classes available on flights landing in Ireland. Availability may vary depending on flight origin and airline.

Complete your trip to Ireland

Explore popular destinations other users love

According to popular flight searches on momondo this year