Cheap flights from Dublin to Washington, D.C. from $249

The month of September is, on average, the cheapest month to fly to Washington, D.C. from Dublin, with most prices found around $509. If you’re not able to fly to Washington, D.C. in September, then October is your next best option. Flight prices from Dublin to Washington, D.C. during October average around $521.

On average, the least expensive day to fly to Washington, D.C. from Dublin is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $695. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from Dublin to Washington, D.C. for around $879.

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 $659. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets in the morning because they tend to be around $831. Of course, these prices can vary depending on the time of year and what airport you fly to.

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 $622 when searching weeks out. 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 $503 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 21% on your flight if you consider stops on a Dublin to Washington, D.C. flight.

As of February 2026, prices for Dublin to Washington, D.C. flights are approximately 82% more expensive when compared to flights at the same time last year.

Historically, on average around 14% 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 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.

The number of flights available between Dublin and Washington, D.C. is 6 per day as of February 2026. The most frequent departure time is 12:00PM, with 100% of daily flights leaving in the afternoon.

The number of flights available between Dublin and Washington, D.C. is 45 per week as of February 2026. The most frequent departure day is Tue, with 16% of weekly flights leaving on this day.