Cheap flights from Ireland to Washington, D.C. from $372

In general, December is the cheapest month to fly from Ireland to Washington, D.C. Dulles Intl Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $366. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of December, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $370.

Our data shows that Tuesday is the least expensive day to fly to Washington, D.C. Dulles Intl Airport. Tickets to fly out on this day can be as low as $753. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Ireland to Washington, D.C. Dulles Intl Airport for around $923.

Flying to Washington, D.C. Dulles Intl Airport from Ireland in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $681 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 $851 on average. Flights to Washington, D.C. Dulles Intl Airport from Ireland in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

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

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from Ireland when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. Dulles Intl Airport for around $645 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. Dulles Intl Airport from Ireland for as low as $502 on momondo.

There are 3 cabin classes available to choose from on Ireland to Washington, D.C. Dulles Intl Airport flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Aer Lingus and Air Canada are the most popular carriers operating from Ireland to Washington, D.C. Dulles Intl

Aer Lingus, United Airlines and Icelandair are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from Ireland according to our data. Aer Lingus is the first choice among our users, with 69% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 3 different airlines that fly to Washington, D.C. Dulles Intl Airport on a routine basis, so you have a few additional options to choose from.

Historically, on average around 14% of flights between Ireland and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 155 minutes.

Generally, flights departing at night tend to experience fewer delays. Flights in the morning have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 13% of their flights experiencing any sort of delay.

As of May 2026, there are 14 flights per day flying from Ireland to Washington, D.C. Dulles Intl Airport. The most common time of day flights depart is 12:00PM, with 83% of flights taking off in the afternoon.

As of May 2026, there are 98 flights per week flying from Ireland to Washington, D.C. Dulles Intl Airport. The most common day of the week flights depart is Thu, with 15% of flights taking off on this day.