Cheap flights from Dublin to Seattle from $377

In general, February is the cheapest month to fly from Dublin to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $619. If you don’t want to visit Seattle in February, then you should wait until December to fly from Dublin, when ticket prices are also cheap, with an average price of $627.

On average, the least expensive day to fly to Seattle from Dublin is on a Friday. momondo users have found tickets for Friday departures for as low as $603. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Dublin because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $1,226.

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

You are more likely to see cheaper flights to Seattle from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $723 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Dublin for as low as $606 on momondo.

You could potentially save up to 1% on your flight if you consider stops on a Dublin to Seattle flight.

Historically, on average around 9% of flights between Dublin and Seattle have experienced a delay on any given week. The average delay length over the past 12 months has been 158 minutes.

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

Tuesday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 9% of their flights experiencing any sort of delay.

Istanbul (IST) was the most common stop: 60% of momondo users choosing 1-stop flights on this route connected there.

Flights via Chicago (ORD) offer the lowest average round-trip price of $825.

Flights connecting via London (LHR) have the shortest average one-way travel time: 14h 10m.

London (LHR) has the shortest average layover time for this route: 2h 00m.

The number of flights available between Dublin and Seattle is 2 per day as of May 2026. The most frequent departure time is 3:00PM, with 100% of daily flights leaving in the afternoon.

As of May 2026, there are 20 flights per week flying from Dublin to Seattle. The most common day of the week flights depart is Tue, with 20% of flights taking off on this day.