Cheap flights from Seattle to Dublin from C$ 439

If you’re not able to fly to Dublin in February, then January is your next best option. Flight prices from Seattle to Dublin during January average around C$ 712.

On average, the least expensive day to fly to Dublin from Seattle is on a Sunday. momondo users have found tickets for Sunday departures for as low as C$ 744. However, this price may fluctuate depending on the airline, the season, and holidays. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around C$ 1,290. These prices are subject to change though, so be sure to set up a Price Alert for flights to Dublin.

According to our data, the cheapest time of day to fly to Dublin is in the afternoon. momondo users have found flights departing from Seattle to Dublin in the afternoon for as low as C$ 916. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the evening are often more expensive with an average ticket price of C$ 1,181.

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

You are more likely to see cheaper flights to Dublin from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around C$ 1,037 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Seattle for as low as C$ 859 on momondo.

There is only 1 cabin class available to choose from on Seattle to Dublin 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 25% on your flight if you consider stops on a Seattle to Dublin flight.

As of September 2026, prices for Seattle to Dublin flights are approximately 16% cheaper when compared to flights at the same time last year.

As of September 2026, 3 flights take off from Seattle and land in Dublin each day. The most common flight departure time for this route is 7:00p.m., with 100% of daily flights taking off in the evening.

The number of flights available between Seattle and Dublin is 24 per week as of September 2026. The most frequent departure day is Mon, with 17% of weekly flights leaving on this day.