Cheap flights from Seattle to Dublin from $247

In general, February is the cheapest month to fly from Seattle to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $464. 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 $486.

The cheapest day to depart from Seattle to Dublin is on a Wednesday. Travelers who choose to depart for Dublin on a Wednesday will often find tickets for as low as $746. Flights from Seattle to Dublin on a Saturday will generally be more expensive and average around $1,045. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the afternoon is the cheapest time of day to fly from Seattle to Dublin when you can find flight prices for as low as $751. Flying to Dublin in the afternoon is an ideal time because this is during off-peak travel hours. Flights in the evening are often more expensive with an average ticket price of $892.

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 $724 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 $620 on momondo.

There are 2 cabin classes 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 15% on your flight if you consider stops on a Seattle to Dublin flight.

As of August 2026, prices for Seattle to Dublin flights are approximately 43% cheaper when compared to flights at the same time last year.

Reykjavik (KEF) was the most common stop: 69% of momondo users choosing 1-stop flights on this route connected there.

Flights via Istanbul (IST) offer the lowest average round-trip price of $654.

Flights connecting via London (LHR) have the shortest average one-way travel time: 12h 20m.

Reykjavik (KEF) has the shortest average layover time for this route: 3h 12m.