Cheap Flights from Seattle / Tacoma International to Dublin

Compare Seattle / Tacoma International to Dublin flight deals

Find the cheapest month or even day of the year to fly to Dublin

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Flight deals from Seattle / Tacoma International to Dublin

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International to Dublin? Find the lowest prices on one-way and return tickets right here.
Map with a flight path from Seattle / Tacoma International to Dublin. A plane icon is halfway along the route with a label that says "Direct flight".
Direct flight

Your route at a glance

Cheapest dealR 6,495
Cheapest monthFebruary
Average flight duration9 hours and 3 minutes
Most popular airlineAer Lingus

Find the cheapest month to fly from Seattle / Tacoma International to Dublin

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Dublin flights are currently cheapest in January.

Direct flights from Seattle / Tacoma International to Dublin

Seattle / Tacoma International to Dublin: Alternative routes

Compare routes from Seattle / Tacoma International to Dublin below. You may find an airport to fly into that's cheaper, faster, or easier than Dublin.

Finding cheap flights from Seattle / Tacoma International to Dublin: Frequently asked questions

The best price we found for a return flight from Seattle / Tacoma International to Dublin is R 6,495. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
9 hours and 3 minutes is the average flight time from Seattle / Tacoma International to Dublin.
British Airways, Aer Lingus and American Airlines fly direct from Seattle / Tacoma International to Dublin.
As of December 2025, there are 20 flights per week flying from Seattle / Tacoma International to Dublin.
The cheapest month to fly from Seattle / Tacoma International to Dublin is usually February.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Dublin Airport on Tuesday, 10 February 2026.
Yes – the average flight time is 9 hours and 3 minutes.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Dublin but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Dublin is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, Icelandair and Aer Lingus offer the cheapest flight tickets to Dublin.

Flying from Seattle-Tacoma International Airport (SEA) to Dublin Airport (DUB): what you need to know

  • Jump on a direct flight from Seattle-Tacoma International Airport to Dublin Airport and you'll be travelling for an average of 9 hours 5 minutes.

  • Dublin is seven hours ahead of Seattle and is in the UTC+0 timezone.

  • Flights from SEA to DUB start from 18:45 — the earliest with Aer Lingus. The last departure is at 21:00 with Aer Lingus. Overall, there are six weekly Seattle-Tacoma International Airport to Dublin Airport flights.

  • For a smooth journey, arrive at the airport two hours ahead of international flights and an hour before domestic departures. This will give you enough time to board your SEA to DUB flight.

  • Be prepared for longer queues during popular months such as July. Arriving up to four hours in advance for an international flight and two hours for domestic departures will give you ample time for security and boarding.

  • Travelling to Dublin (and then exploring more of Ireland!) is easy with Aer Lingus. This popular carrier has direct flights from Seattle-Tacoma International Airport to Dublin Airport.

  • Aer Lingus is the most frequently booked airline on this route.

  • The most punctual carrier offering SEA to DUB flights is Aer Lingus. Its services arrive as scheduled 77.78% of the time.

  • We make it easy to book a flight with a stopover. To see all your options for tickets from Seattle-Tacoma International Airport to Dublin Airport, uncheck 'Direct flights only.' Then, pick a flight offering a stop long enough to visit your chosen city. Some great stopovers between SEA and DUB include:

    • Vancouver International Airport

    • Keflavik International Airport

    • London Heathrow Airport

How to find the cheapest flights from Seattle-Tacoma International Airport (SEA) to Dublin Airport (DUB)

  • Right now, R 4,466 is the cheapest price we've found for a one-way Seattle-Tacoma International Airport to Dublin Airport flight. The best price for a return ticket is R 6,495. Remember that fares may change due to demand when booking.

  • To pick up cheap tickets from SEA to DUB, book your trip nine months ahead of your departure.

  • August is the cheapest month for flights from Seattle-Tacoma International Airport to Dublin Airport. If you prefer to fly during a different time of year, the 'Whole month' tool will give you the lowest airfares for every month.

  • Getting your hands on cheap flights from SEA to DUB is easy with Price Alerts. All you need to do is create one of these automatic alerts and we'll notify you when a lower fare pops up.

  • Lock in the perfect flight for you by using the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Seattle-Tacoma International Airport to Dublin Airport, use the 'Sort by' function. You can also filter results by airline, departure and arrival times, and journey duration.

Handy information about Seattle-Tacoma International Airport (SEA)

  • 81.27% of flights leaving Seattle-Tacoma International Airport touch down at their destination as planned. Given its reliable on-time performance, you're unlikely to face delays when setting off from SEA.

  • Central Seattle to Seattle-Tacoma International Airport is around 23 kilometres. Depending on traffic, it'll take about 20 minutes to get there if you're catching a cab, ride-sharing or driving.

  • The trip on public transport typically takes 55 minutes.

  • Need a handy hotel near SEA? If you're boarding an early flight from Seattle-Tacoma International Airport to Dublin Airport, these stays will have you moments from check-in:

Arriving at Dublin Airport (DUB)

Getting from Dublin Airport (DUB) to central Dublin

  • Dublin Airport to the centre of Dublin has a drive time of around 30 minutes. It's approximately 21 kilometres away.

  • Travelling on public transport takes about 2 hours 10 minutes.

When to fly to Dublin Airport (DUB)

  • August is the busiest month for flights from Seattle-Tacoma International Airport to Dublin Airport. To escape the crowds, head to Dublin in January.

  • The warmest month in Dublin is July, with temperatures ranging between 10ºC (50ºF) and 20ºC (68ºF). Lock in your flights from Seattle-Tacoma International Airport to Dublin Airport in this month if you like this kind of weather.

  • Look for cheap tickets from SEA to DUB in January if you like travelling in cooler conditions. Temperatures are at their lowest then, ranging between 1ºC (34ºF) and 9ºC (48ºF) on average.

Explore more of Ireland

  • Dublin has its own special appeal, but there are so many other parts of Ireland waiting to be discovered. Around 225 kilometres south-west of Dublin, a trip to Cork will keep your itinerary packed. Don't miss top attractions like Blarney Castle, Fota Wildlife Park and Titanic Experience Cobh.

  • If you want to check out another corner of Ireland, head for Tallaght, roughly 10 kilometres south-west of Dublin. Church of the Incarnation, Fettercairn, 3 stuffed bears and Johnson & Perrott Fleet are highlights.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.