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

TAP AIR PORTUGAL, United Airlines, and KLM 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 69% of people opting to fly with this airline when traveling to Ireland. Keep in mind that there are 13 different airlines that fly to Ireland on a routine basis, so you have a few additional options to choose from.

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 April 2026, there are 13 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.

$277 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.

12:00 pm - 11:50 am

SEA

DUB

39h 50m

2 stops

12:40 pm - 1:45 pm

DUB

SEA

33h 05m

1 stop

$692Scandinavian Airlines

Wed, Aug 19 - Thu, Aug 27

12:00 pm - 11:50 am

SEA

DUB

39h 50m

2 stops

11:40 am - 1:45 pm

DUB

SEA

58h 05m

2 stops

$694Scandinavian Airlines

Wed, Aug 19 - Wed, Aug 26

3:55 pm - 10:25 am

SEA

DUB

34h 30m

2 stops

7:50 pm - 1:45 pm

DUB

SEA

25h 55m

2 stops

$695Scandinavian Airlines

Sat, Aug 22 - Mon, Aug 31

11:55 pm - 12:05 am

SEA

DUB

40h 10m

2 stops

6:50 pm - 10:38 pm

DUB

SEA

35h 48m

2 stops

$696TAP AIR PORTUGAL

Thu, Oct 1 - Thu, Oct 15

11:55 pm - 12:05 am

SEA

DUB

40h 10m

2 stops

10:45 am - 10:38 pm

DUB

SEA

43h 53m

2 stops

$699TAP AIR PORTUGAL

Wed, Oct 14 - Fri, Oct 23

5:00 am - 7:30 am

SEA

SNN

18h 30m

2 stops

9:30 am - 3:36 pm

SNN

SEA

14h 06m

1 stop

$753United Airlines

Mon, Sep 7 - Wed, Sep 16

5:00 am - 7:30 am

SEA

SNN

18h 30m

2 stops

9:30 am - 9:11 pm

SNN

SEA

19h 41m

2 stops

$758United Airlines

Mon, Sep 7 - Wed, Sep 16

11:53 pm - 11:10 am

SEA

SNN

27h 17m

2 stops

1:05 pm - 10:16 pm

SNN

SEA

17h 11m

1 stop

$808Delta

Fri, Sep 4 - Thu, Sep 10

1:30 pm - 2:40 pm

SEA

ORK

17h 10m

1 stop

10:50 am - 11:37 am

ORK

SEA

32h 47m

1 stop

$1,105KLM

Tue, May 26 - Wed, Jun 3

10:15 am - 2:40 pm

SEA

ORK

20h 25m

2 stops

10:50 am - 4:24 pm

ORK

SEA

13h 34m

1 stop

$1,109Delta

Tue, May 26 - Thu, Jun 4

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Scandinavian Airlines flights from Seattle to Ireland

Our best Scandinavian Airlines deals on Seattle to Ireland flight tickets

Scandinavian Airlines

Aug 19

SEA12:00 pmSeattle/Tacoma Intl

39h 50m

2 stops

DUB11:50 amDublin

Aug 27

DUB12:40 pmDublin

33h 05m

1 stop

SEA1:45 pmSeattle/Tacoma Intl

$692

Scandinavian Airlines

Aug 19

SEA12:00 pmSeattle/Tacoma Intl

39h 50m

2 stops

DUB11:50 amDublin

Aug 26

DUB11:40 amDublin

58h 05m

2 stops

SEA1:45 pmSeattle/Tacoma Intl

$694

Scandinavian Airlines

Aug 22

SEA3:55 pmSeattle/Tacoma Intl

34h 30m

2 stops

DUB10:25 amDublin

Aug 31

DUB7:50 pmDublin

25h 55m

2 stops

SEA1:45 pmSeattle/Tacoma Intl

$695

Air Canada flights from Seattle to Ireland

Our best Air Canada deals on Seattle to Ireland flight tickets

Air Canada

May 4

SEA7:20 pmSeattle/Tacoma Intl

28h 25m

1 stop

DUB7:45 amDublin

May 12

DUB9:50 amDublin

32h 15m

2 stops

SEA10:05 amSeattle/Tacoma Intl

$862

Air Canada

May 4

SEA7:20 pmSeattle/Tacoma Intl

28h 55m

2 stops

DUB8:15 amDublin

May 12

DUB9:50 amDublin

32h 15m

2 stops

SEA10:05 amSeattle/Tacoma Intl

$870

Air Canada

Sep 7

SEA8:00 amSeattle/Tacoma Intl

28h 35m

2 stops

SNN8:35 pmShannon

Sep 10

SNN7:30 amShannon

21h 34m

2 stops

SEA9:04 pmSeattle/Tacoma Intl

$953

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 8/19

12:00 pm-11:50 am

2 stops39h 50m

Dublin

Thu 8/27

12:40 pm-1:45 pm

1 stop33h 05m

$692

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 8/19

12:00 pm-11:50 am

2 stops39h 50m

Dublin

Wed 8/26

11:40 am-1:45 pm

2 stops58h 05m

$694

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Sat 8/22

3:55 pm-10:25 am

2 stops34h 30m

Dublin

Mon 8/31

7:50 pm-1:45 pm

2 stops25h 55m

$695

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Thu 10/1

11:55 pm-12:05 am

2 stops40h 10m

Dublin

Thu 10/15

6:50 pm-10:38 pm

2 stops35h 48m

$696

SeattleDublin

SEA - DUB

SEADUB

Seattle/Tacoma Intl

Wed 10/14

11:55 pm-12:05 am

2 stops40h 10m

Dublin

Fri 10/23

10:45 am-10:38 pm

2 stops43h 53m

$699

Quickest round-trip

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 9/7

5:00 am-7:30 am

2 stops18h 30m

Shannon

Wed 9/16

9:30 am-3:36 pm

1 stop14h 06m

$753

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Mon 9/7

5:00 am-7:30 am

2 stops18h 30m

Shannon

Wed 9/16

9:30 am-9:11 pm

2 stops19h 41m

$758

SeattleShannon

SEA - SNN

SEASNN

Seattle/Tacoma Intl

Fri 9/4

11:53 pm-11:10 am

2 stops27h 17m

Shannon

Thu 9/10

1:05 pm-10:16 pm

1 stop17h 11m

$808

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Tue 5/26

1:30 pm-2:40 pm

1 stop17h 10m

Cork

Wed 6/3

10:50 am-11:37 am

1 stop32h 47m

$1,105

SeattleCork

SEA - ORK

SEAORK

Seattle/Tacoma Intl

Tue 5/26

10:15 am-2:40 pm

2 stops20h 25m

Cork

Thu 6/4

10:50 am-4:24 pm

1 stop13h 34m

$1,109

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

What is the cheapest month to fly to Ireland?

In general, August 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 $226. If you aren’t able to travel to Ireland during the month of August, then flying in November is also cheap. Prices for this month can be found on momondo for an average of $300.

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 Wednesday when prices can be found for as low as $680. 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 $869. 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 $713. 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 $755.

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 from Seattle 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 $618 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 $501 on momondo.

Can stopping save me money on Seattle to Ireland flights?

You could potentially save up to 43% 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	$466
Fastest flight time	9h 05m
Direct flights	Mon, Tue, Wed, Fri, Sat and Sun
Airports in Ireland	77 airports

The best one-way flight to Ireland from Seattle in the past 72 hours is $466. The best round-trip flight deal from Seattle to Ireland found on momondo in the last 72 hours is $985.

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

Direct flights go from Seattle to Ireland on Monday, Tuesday, Wednesday, Friday, Saturday and Sunday. There are no airlines offering direct flights.

There are 77 airports in Ireland. From Seattle there are direct flights to Dublin (DUB).

Search flight deals

Frequently asked questions about flying from Seattle to Ireland

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 April 2026, there are 13 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 (69.29% of total bookings). The next most popular plane models are Airbus A330-900neo (9.83%), Boeing 787-10 Dreamliner (4.37%), and Airbus A320-100/200 (2.77%).

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 7.1 2,969 reviews	Search JetBlue flights
Air Canada	PriceFrom $341	Free Cancellation	Rating 7.1 10,983 reviews	Search Air Canada flights
United Airlines	PriceFrom $341	Free Cancellation	Rating 7.4 9,679 reviews	Search United Airlines flights
Icelandair	PriceFrom $346	Free Cancellation	Rating 7.0 646 reviews	Search Icelandair flights
Iberia	PriceFrom $367	Free Cancellation	Rating 7.0 3,204 reviews	Search Iberia flights
Aer Lingus	PriceFrom $392	Free Cancellation	Rating 7.3 1,536 reviews	Search Aer Lingus flights
KLM	PriceFrom $405	Free Cancellation	Rating 7.8 1,512 reviews	Search KLM flights
British Airways	PriceFrom $407	Free Cancellation	Rating 6.7 7,937 reviews	Search British Airways flights
Scandinavian Airlines	PriceFrom $444	Free Cancellation	Rating 7.4 1,767 reviews	Search Scandinavian Airlines flights
Lufthansa	PriceFrom $456	Free Cancellation	Rating 6.8 7,964 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

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Complete your trip

Feeling lucky

Popular cities in Ireland

Flights to Dublinfrom $451

Flights to Shannon, Clarefrom $566

Flights to Corkfrom $588

Flights to Knockfrom $858

Flights to Milltown (Kerry)from $655

Flights to Donegalfrom $822

Cheap flights from Seattle to Ireland from $277

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 5/10. 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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Scandinavian Airlines flights from Seattle to Ireland

Our best Scandinavian Airlines deals on Seattle to Ireland flight tickets

Air Canada flights from Seattle to Ireland

Our best Air Canada deals on Seattle to Ireland flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Ireland that are best for you.

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 from Seattle to Ireland?

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?

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

Frequently asked questions about flying 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

Why use momondo?

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