Cheap flights from Ireland to Seattle from €326

If you’re not able to fly to Seattle in September, then August is your next best option. Flight prices from Ireland to Seattle during August average around €370.

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 €700. 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 €622 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 €478 on momondo.

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 168 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 10% of their flights experiencing any sort of delay.

As of June 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 June 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.