Cheap flights from Ireland to Washington, D.C. from $367

In general, November 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 $512. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of November, then flying in September is also cheap. Prices for this month can be found on momondo for an average of $524.

Our data shows that Wednesday 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 $695. When flying out on a Friday, 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 $844.

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 $647 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 $817 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 $617 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 $501 on momondo.

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

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 150 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 February 2026, there are 4 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 100% of flights taking off in the afternoon.

As of February 2026, there are 28 flights per week flying from Ireland to Washington, D.C. Dulles Intl Airport. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.