Cheap flights from Ireland to Seattle from €326

If you’re not able to fly to Seattle in May, then September is your next best option. Flight prices from Ireland to Seattle during September average around €387.

Our data shows that Sunday is the least expensive day to fly to Seattle. Tickets to fly out on this day can be as low as €710. Flights from Ireland to Seattle on a Saturday will generally be more expensive and average around €836. 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 €640 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 €531 on momondo.

There are 2 cabin classes available to choose from on Ireland to Seattle 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 46% on your flight if you consider stops on a Ireland to Seattle flight.

JetBlue, WestJet, and Aer Lingus 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 75% 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 10% 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 179 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.

Thursday 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 10% of their flights experiencing any sort of delay.

As of July 2026, 4 flights take off from Ireland and land in Seattle each day. The most common flight departure time for this route is 15:00, with 100% of daily flights taking off in the afternoon.

As of July 2026, 28 flights take off from Ireland and land in Seattle each week. The most common flight departure day for this route is Mon, with 14% of weekly flights taking off on this day.