Cheap flights from the United Kingdom to Washington, D.C. from £270

The month of January is, on average, the cheapest month to fly to Washington, D.C. Dulles Intl Airport from United Kingdom, with most prices found around £322. If you aren’t able to travel during the month of January, then book flights to Washington, D.C. Dulles Intl Airport from United Kingdom during September instead. Flights to Washington, D.C. Dulles Intl Airport in September, while not as cheap as those in January, still average around £480.

According to our data, Thursday is the cheapest day to fly to Washington, D.C. Dulles Intl Airport from United Kingdom. The lowest ticket price found for a Thursday departure recently was £572. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. On the other hand, Sunday is the most expensive day to depart from United Kingdom because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £617.

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is at midday when flights can be purchased for as low as £574. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the morning when prices are around £586.

Fly from London Heathrow to Washington, D.C. Dulles Intl for the best United Kingdom - Washington, D.C. Dulles Intl flight prices

You are more likely to see cheaper flights to Washington, D.C. Dulles Intl Airport from United Kingdom 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 £544 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. Dulles Intl Airport from United Kingdom for as low as £487 on momondo.

There are 3 cabin classes available to choose from on United Kingdom 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, British Airways, and Finnair are the most popular carriers operating from United Kingdom to Washington, D.C. Dulles Intl

Virgin Atlantic, British Airways and Aer Lingus are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from United Kingdom according to our data. Virgin Atlantic is the first choice among our users, with 34% of people opting to fly with this airline when travelling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 17 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 18% of flights between United Kingdom and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 133 minutes.

Generally, flights departing in the evening tend to experience fewer delays. Flights departing in the morning 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, United Airlines have had the fewest delays on this route over the last 12 months, with about 12% of their flights experiencing any sort of delay.

30 flights are operational daily from United Kingdom to Washington, D.C. Dulles Intl Airport as of June 2026. The most popular departure time for this route is 12:00, with 100% of flights per day taking off in the afternoon.

As of June 2026, 212 flights take off from United Kingdom and land in Washington, D.C. Dulles Intl Airport each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.