Cheap flights from Dublin to Washington, D.C. from €305

The cheapest month to fly to Washington, D.C. from Dublin is in September. Flight prices, which tend to average around €155, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Washington, D.C. from Dublin during December instead. Flights to Washington, D.C. in December, while not as cheap as those in September, still average around €262.

The cheapest day to depart from Dublin to Washington, D.C. is on a Tuesday. Travellers who choose to depart for Washington, D.C. on a Tuesday will often find tickets for as low as €684. Be sure to avoid booking your departure on a Sunday as prices are generally higher than usual. According to our data, the average ticket price to Washington, D.C. on Sunday is €824.

Flying to Washington, D.C. from Dublin in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as €537 when looking at flights departing in the afternoon. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are €744 on average. Flights to Washington, D.C. from Dublin in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

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 €540 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 €435 on momondo.

You could potentially save up to 42% on your flight if you consider stops on a Dublin to Washington, D.C. flight.

As of April 2026, prices for Dublin to Washington, D.C. flights are approximately 57% more expensive when compared to flights at the same time last year.

Icelandair and TAP AIR PORTUGAL are the most popular carriers operating from Dublin to Washington, D.C.

Aer Lingus, United Airlines and British Airways 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 64% 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 15% 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 152 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights departing in the morning 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. Friday 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 14% of their flights experiencing any sort of delay.

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

Flights via Lisbon (LIS) offer the lowest average return price of €331.

Flights connecting via Reykjavik (KEF) have the shortest average one-way travel time: 12h 03m.

Reykjavik (KEF) has the shortest average stopover time for this route: 2h 00m.

As of April 2026, 14 flights take off from Dublin and land in Washington, D.C. each day. The most common flight departure time for this route is 12:00, with 85% of daily flights taking off in the afternoon.

98 flights are operational weekly from Dublin to Washington, D.C. as of April 2026. The most popular departure day for this route is Thu, with 15% of flights per week taking off on this day.