Cheap flights from Ireland to Seattle from €222

If you’re not able to fly to Seattle in November, then September is your next best option. Flight prices from Ireland to Seattle during September average around €559.

Our data shows that Thursday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as €633. Flights from Ireland to Seattle on a Tuesday will generally be more expensive and average around €823. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

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

You are more likely to see cheaper flights to Seattle from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around €623 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Ireland for as low as €529 on momondo.

There is only 1 cabin class available to choose from on Ireland to Seattle/Tacoma Intl 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 16% on your flight if you consider stops on a Ireland to Seattle flight.

WestJet, Aer Lingus, and British Airways are the most popular carriers operating from Ireland to Seattle/Tacoma Intl

Aer Lingus, Icelandair and British Airways are the top three most popular airlines that fly to Seattle from Ireland according to our data. Aer Lingus is the first choice among our users, with 62% of people opting to fly with this airline when travelling to Seattle. Keep in mind that there are 3 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Historically, on average around 9% of flights between Ireland and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 163 minutes.

Generally, flights departing in the early afternoon tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Saturday has historically seen more delays on average compared to the rest of the week.

According to our data, Aer Lingus have had the fewest delays on this route over the last 12 months, with about 9% of their flights experiencing any sort of delay.

As of February 2026, 16 flights take off from Ireland and land in Seattle each week. The most common flight departure day for this route is Mon, with 25% of weekly flights taking off on this day.

On average, it takes 9h 45m to fly from Ireland to Seattle if you fly out of Dublin (the most popular airport in Ireland) and into Seattle (the most popular airport in Seattle). If you’re flying out of Cork and into Seattle, then the flight time is around 13h 30m.