Cheap flights from Ireland to Seattle from £318

The cheapest month to fly to Seattle from Ireland is in April. Flight prices, which tend to average around £442, are often lower during this time because this is during the off-season. The month of May is another great option to travel to Seattle, with average flight prices from Ireland averaging around £471.

According to our data, Wednesday is the cheapest day to fly to Seattle from Ireland. The lowest ticket price found for a Wednesday departure recently was £544. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Tuesday as prices are generally higher than usual. According to our data, the average ticket price to Seattle on Tuesday is £961.

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 £575 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 £441 on momondo.

There are 3 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 1% on your flight if you consider stops on a Ireland to Seattle flight.

Delta is the most popular carrier 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 78% 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 12% 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 12% of their flights experiencing any sort of delay.

As of October 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 October 2026, there are 28 flights per week flying from Ireland to Seattle. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.