Cheap flights from Washington, D.C. to Dublin from $270

In general, November is the cheapest month to fly from Washington, D.C. to Dublin. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $123. If you’re not able to fly to Dublin in November, then December is your next best option. Flight prices from Washington, D.C. to Dublin during December average around $232.

The cheapest day to depart from Washington, D.C. to Dublin is on a Tuesday. Travelers who choose to depart for Dublin on a Tuesday will often find tickets for as low as $727. Flights from Washington, D.C. to Dublin on a Friday will generally be more expensive and average around $841. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

In the evening is the cheapest time of day to fly from Washington, D.C. to Dublin when you can find flight prices for as low as $779. Flying to Dublin in the evening is an ideal time because this is during off-peak travel hours. Flights in the afternoon are often more expensive with an average ticket price of $793.

Fly from Washington, D.C. Dulles Intl to Dublin for the best Washington, D.C. - Dublin flight prices

You are more likely to see cheaper flights to Dublin from Washington, D.C. when booking weeks ahead of your departure date. In general, you can expect to find flights to Dublin for around $716 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Dublin from Washington, D.C. for as low as $654 on momondo.

You could potentially save up to 13% on your flight if you consider stops on a Washington, D.C. to Dublin flight.

As of May 2026, prices for Washington, D.C. to Dublin flights are approximately 11% cheaper when compared to flights at the same time last year.

JetBlue, Scandinavian Airlines, and Icelandair are the most popular carriers operating from Washington, D.C. to Dublin

Aer Lingus, United Airlines and Icelandair are the top three most popular airlines that fly to Dublin from Washington, D.C. according to our data. Aer Lingus is the first choice among our users, with 56% of people opting to fly with this airline when traveling to Dublin. Keep in mind that there are 14 different airlines that fly to Dublin on a routine basis, so you have a few additional options to choose from.

Historically, on average around 17% of flights between Washington, D.C. and Dublin have experienced a delay on any given week. The average delay length over the past 12 months has been 179 minutes.

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

Saturday is statistically the day of the week which experiences the fewest number of delays on this flight route. Thursday 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 13% of their flights experiencing any sort of delay.

Reykjavik (KEF) was the most common stop: 47% of momondo users choosing 1-stop flights on this route connected there.

Flights via Newark (EWR) offer the lowest average round-trip price of $496.

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 9h 54m.

Reykjavik (KEF) has the shortest average layover time for this route: 1h 29m.

As of May 2026, there are 14 flights per day flying from Washington, D.C. to Dublin. The most common time of day flights depart is 5:00PM, with 65% of flights taking off in the evening.

As of May 2026, 101 flights take off from Washington, D.C. and land in Dublin each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.