$363 Cheap Flights from Seattle (SEA) to Dublin (DUB)

View $363 flight on Wed, Oct 15, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Seattle to Dublin (SEA-DUB)

Prices were available within the past 7 days and start at $363 for one-way flights and $470 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Mon, Aug 18 - Tue, Sep 2
SEA
Seattle
DUB
Dublin
$470 Roundtrip, found 3 hours ago
$470
Roundtrip
found 3 hours ago
Select Scandinavian Airlines flight, departing Mon, Aug 18 from Seattle to Dublin, returning Tue, Sep 2, priced at $470 found 3 hours ago
Icelandair
Mon, Oct 27 - Wed, Nov 5
SEA
Seattle
DUB
Dublin
$519 Roundtrip, just found
$519
Roundtrip
just found
Select Icelandair flight, departing Mon, Oct 27 from Seattle to Dublin, returning Wed, Nov 5, priced at $519 just found
Aer Lingus
Tue, Oct 14 - Wed, Oct 22
SEA
Seattle
DUB
Dublin
$545 Roundtrip, found 2 days ago
$545
Roundtrip
found 2 days ago
Select Aer Lingus flight, departing Tue, Oct 14 from Seattle to Dublin, returning Wed, Oct 22, priced at $545 found 2 days ago
Lufthansa
Mon, Aug 4 - Tue, Aug 19
SEA
Seattle
DUB
Dublin
$551 Roundtrip, just found
$551
Roundtrip
just found
Select Lufthansa flight, departing Mon, Aug 4 from Seattle to Dublin, returning Tue, Aug 19, priced at $551 just found
Air Canada
Mon, Aug 4 - Tue, Aug 19
SEA
Seattle
DUB
Dublin
$551 Roundtrip, just found
$551
Roundtrip
just found
Select Air Canada flight, departing Mon, Aug 4 from Seattle to Dublin, returning Tue, Aug 19, priced at $551 just found
United
Tue, Aug 12 - Tue, Aug 26
SEA
Seattle
DUB
Dublin
$551 Roundtrip, found 1 hour ago
$551
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Aug 12 from Seattle to Dublin, returning Tue, Aug 26, priced at $551 found 1 hour ago
Delta
Tue, Feb 3 - Tue, Feb 17
SEA
Seattle
DUB
Dublin
$573 Roundtrip, found 9 hours ago
$573
Roundtrip
found 9 hours ago
Select Delta flight, departing Tue, Feb 3 from Seattle to Dublin, returning Tue, Feb 17, priced at $573 found 9 hours ago
American Airlines
Tue, Feb 3 - Tue, Feb 17
SEA
Seattle
DUB
Dublin
$577 Roundtrip, found 9 hours ago
$577
Roundtrip
found 9 hours ago
Select American Airlines flight, departing Tue, Feb 3 from Seattle to Dublin, returning Tue, Feb 17, priced at $577 found 9 hours ago
Iberia
Mon, Oct 27 - Wed, Nov 5
SEA
Seattle
DUB
Dublin
$587 Roundtrip, just found
$587
Roundtrip
just found
Select Iberia flight, departing Mon, Oct 27 from Seattle to Dublin, returning Wed, Nov 5, priced at $587 just found
British Airways
Mon, Oct 27 - Wed, Nov 5
SEA
Seattle
DUB
Dublin
$588 Roundtrip, just found
$588
Roundtrip
just found
Select British Airways flight, departing Mon, Oct 27 from Seattle to Dublin, returning Wed, Nov 5, priced at $588 just found
Flights from Seattle (SEA) to Dublin (DUB)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Dublin
Airlines serving
Aer Lingus, Air Canada, Air France, Alaska Airlines, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, WestJet
Roundtrip price
$469
Distance
4526 mi

Seattle to Dublin Flights

The cheapest times to fly from Seattle to Dublin

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Dublin are during the month of August. You can find some of the cheapest flights from Seattle to Dublin with Expedia's search tool and vast selection of airlines.

The best time to book a flight from Seattle to Dublin

Sunday is one of the best days to book for cheap flights from Seattle to Dublin: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

How to find cheap round-trip tickets from Seattle to Dublin

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Dublin in 2025. You can also book with separate airlines for your outbound and return journeys, from $363 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Dublin flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Dublin airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

*Terms apply.

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Dublin Airport (DUB) cost?
Cheap round-trip flights from Seattle - Tacoma Intl. Airport (SEA) to Dublin Airport (DUB) start at $527. This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Aer Lingus flight leaving SEA on May 20 2025 and touching down at DUB. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from SEA to DUB?
The cheapest flights from SEA to DUB are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to DUB?
With tickets starting at $588 for a one-way flight from SEA to DUB, American Airlines is currently the cheapest airline for this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from SEA on May 5 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Dublin Airport (DUB)?
Direct flights from Seattle - Tacoma Intl. Airport (SEA) to Dublin Airport (DUB) aren’t available daily, so you’ll have to take a flight with a layover. Explore your options with Expedia’s filters. Enter your dates and choose either “1 Stop” or “2+ Stops.”
What day of the week has the most flights from SEA to DUB?
You’ll typically find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Dublin Airport (DUB)?
To touch down at Dublin Airport (DUB) on time, opt for a flight that leaves Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Dublin Airport (DUB) last-minute?
Booking your flight from SEA to DUB shortly before your journey is typically more expensive. However, if you’re flexible with your itinerary, you could land a cheap last-minute fare.
Is it cheaper to book a SEA to DUB flight and hotel package?
Compared with arranging hotels and flights separately, booking a SEA to DUB flight and hotel package with Expedia could result in significant savings. What’s more, having everything in one place will take the stress out of travel planning. Simply pick your flights and choose from our extensive range of stays, then customize your trip with extras like tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Dublin Airport (DUB)?
Typically, it’s possible to reschedule or cancel your SEA to DUB flight. However, if it’s been more than 24 hours since booking, additional charges may apply. Refer to your airline’s policies in your itinerary to see what changes are allowed and whether any costs are involved. You’ll also find further details on our Customer Service portal.

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*Available to One Key members.