Cheap flights from Washington, D.C. Dulles Intl Airport to Ireland from €229

The month of April is another great option to travel to Ireland, with average flight prices from Washington, D.C. Dulles Intl Airport averaging around €311.

The cheapest day to depart on your flight to Ireland is on a Thursday when prices can be found for as low as €689. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around €854. These prices are subject to change though, so be sure to set up a Price Alert for flights to Ireland.

In the evening is the cheapest time of day to fly from Washington, D.C. Dulles Intl Airport to Ireland when you can find flight prices for as low as €672. Flying to Ireland in the evening is an ideal time because this is during off-peak travel hours. In contrast, the most expensive time of day to depart to Ireland is in the afternoon when prices are around €726.

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

You are more likely to see cheaper flights to Ireland from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to Ireland for around €630 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Ireland from Washington, D.C. Dulles Intl Airport for as low as €550 on momondo.

There is only 1 cabin class available to choose from on Washington, D.C. Dulles Intl Airport to Ireland 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 16% of flights between Washington, D.C. and Ireland have experienced a delay on any given week. The average delay length over the past 12 months has been 181 minutes.

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

Saturday is statistically the day of the week that experiences the fewest 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 fewest delays on this route over the last 12 months, with about 12% of their flights experiencing any sort of delay.

The number of flights available between Washington, D.C. Dulles Intl Airport and Ireland is 12 per day as of May 2026. The most frequent departure time is 17:00, with 60% of daily flights leaving in the evening.

The number of flights available between Washington, D.C. Dulles Intl Airport and Ireland is 89 per week as of May 2026. The most frequent departure day is Fri, with 17% of weekly flights leaving on this day.