Cheap flights from Dublin to Washington, D.C. from £307

The cheapest month to fly to Washington, D.C. from Dublin is in November. Flight prices, which tend to average around £410, are often lower during this time because this is during the off-season. If you don’t want to visit Washington, D.C. in November, then you should wait until February to fly from Dublin, when ticket prices are also cheap, with an average price of £421.

On average, the least expensive day to fly to Washington, D.C. from Dublin is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £596. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from Dublin because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £688.

In the afternoon is the cheapest time of day to fly from Dublin to Washington, D.C. when you can find flight prices for as low as £549. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Washington, D.C. are more costly in the morning, with an average ticket price of £668. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Washington, D.C. from Dublin when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around £508 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from Dublin for as low as £410 on momondo.

There are 3 cabin classes available to choose from on Dublin to Washington, D.C. 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 9% on your flight if you consider stops on a Dublin to Washington, D.C. flight.

As of September 2026, prices for Dublin to Washington, D.C. flights are approximately 2% cheaper when compared to flights at the same time last year.

KLM and Delta are the most popular carriers operating from Dublin to Washington, D.C.

Aer Lingus, British Airways and United Airlines are the top three most popular airlines that fly to Washington, D.C. from Dublin according to our data. Aer Lingus is the first choice among our users, with 60% of people opting to fly with this airline when travelling to Washington, D.C.. Keep in mind that there are 4 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Historically, on average around 13% of flights between Dublin and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 147 minutes.

Generally, flights departing in the evening 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. Sunday 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 13% of their flights experiencing any sort of delay.

Boston (BOS) was the most common stop: 50% of momondo users choosing one-stop flights on this route connected there.

Flights via Reykjavik (KEF) offer the lowest average return price of £453.

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 11h 05m.

Reykjavik (KEF) has the shortest average stopover time for this route: 1h 31m.

13 flights are operational daily from Dublin to Washington, D.C. as of September 2026. The most popular departure time for this route is 12:00, with 85% of flights per day taking off in the afternoon.

As of September 2026, there are 96 flights per week flying from Dublin to Washington, D.C.. The most common day of the week flights depart is Sat, with 16% of flights taking off on this day.