Cheap flights from the United Kingdom to Washington, D.C. from $355

In general, September is the cheapest month to fly from United Kingdom 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 $670. If you aren’t able to travel to Washington, D.C. Dulles Intl Airport during the month of September, then flying in February is also cheap. Prices for this month can be found on momondo for an average of $676.

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 $740. When flying out on a Sunday, the most expensive travel day of the week, you can expect to see flight prices from United Kingdom to Washington, D.C. Dulles Intl Airport for around $919.

Flying to Washington, D.C. Dulles Intl Airport from United Kingdom in the morning is the least expensive time of day to depart. momondo users have found prices as low as $787 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $807 on average. Flights to Washington, D.C. Dulles Intl Airport from United Kingdom at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $725 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 United Kingdom for as low as $662 on momondo.

There are 4 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

Aer Lingus, British Airways and Lufthansa are the top three most popular airlines that fly to Washington, D.C. Dulles Intl Airport from United Kingdom according to our data. Aer Lingus is the first choice among our users, with 40% of people opting to fly with this airline when traveling to Washington, D.C. Dulles Intl Airport. Keep in mind that there are 9 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 17% 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 139 minutes.

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

Saturday is statistically the day of the week which experiences the fewest number of 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 least number of delays on this route over the last 12 months; with about 11% of their flights experiencing any sort of delay.

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

As of August 2026, 217 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 Fri, with 17% of weekly flights taking off on this day.