Cheap flights from Seattle to Dublin from $308

In general, February is the cheapest month to fly from Seattle to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $515. If you’re not able to fly to Dublin in February, then January is your next best option. Flight prices from Seattle to Dublin during January average around $561.

The cheapest day to depart from Seattle to Dublin is on a Wednesday. Travelers who choose to depart for Dublin on a Wednesday will often find tickets for as low as $814. Flights from Seattle to Dublin on a Saturday will generally be more expensive and average around $1,101. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the afternoon is the cheapest time of day to fly from Seattle to Dublin when you can find flight prices for as low as $753. Flying to Dublin in the afternoon is an ideal time because this is during off-peak travel hours. Flights in the evening are often more expensive with an average ticket price of $1,014.

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

You are more likely to see cheaper flights to Dublin from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around $794 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Seattle for as low as $647 on momondo.

There are 2 cabin classes available to choose from on Seattle to Dublin flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 25% on your flight if you consider stops on a Seattle to Dublin flight.

As of October 2026, prices for Seattle to Dublin flights are approximately 15% more expensive when compared to flights at the same time last year.

British Airways is the most popular carrier operating from Seattle/Tacoma Intl to Dublin

Aer Lingus, Icelandair and British Airways are the top three most popular airlines that fly to Dublin from Seattle according to our data. Aer Lingus is the first choice among our users, with 67% of people opting to fly with this airline when traveling to Dublin. Keep in mind that there are 13 different airlines that fly to Dublin on a routine basis, so you have a few additional options to choose from.

Reykjavik (KEF) was the most common stop: 67% of momondo users choosing 1-stop flights on this route connected there.

Flights via Istanbul (IST) offer the lowest average round-trip price of $654.

Flights connecting via London (LHR) have the shortest average one-way travel time: 12h 08m.

Reykjavik (KEF) has the shortest average layover time for this route: 2h 17m.