Cheap flights from London to Washington, D.C. from R7 347

In general, February is the cheapest month to fly from London to Washington, D.C.. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around R10 621. If you aren’t able to travel during the month of February, then book flights to Washington, D.C. from London during January instead. Flights to Washington, D.C. in January, while not as cheap as those in February, still average around R10 921.

Fly from London Heathrow to Baltimore/Washington for the best London - Washington, D.C. flight prices

You are more likely to see cheaper flights to Washington, D.C. from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around R12 095 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. from London for as low as R10 738 on momondo.

There is only 1 cabin class available to choose from on London 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.

Historically, on average around 16% of flights between London and Washington, D.C. have experienced a delay on any given week. The average delay length over the past 12 months has been 140 minutes.

Generally, flights departing in the morning 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, United Airlines have had the fewest delays on this route over the last 12 months, with about 10% of their flights experiencing any sort of delay.

5 flights are operational daily from London to Washington, D.C. as of October 2026. The most popular departure time for this route is 16:00, with 100% of flights per day taking off in the afternoon.

As of October 2026, there are 35 flights per week flying from London to Washington, D.C.. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.