Cheap flights from District of Columbia to London from £299

The cheapest month to fly to London from District of Columbia is in August. Flight prices, which tend to average around £498, are often lower during this time because this is during the off-season. The month of September is another great option to travel to London, with average flight prices from District of Columbia averaging around £509.

Our data shows that Tuesday is the least expensive day to fly to London. Tickets to fly out on this day can be as low as £531. When flying out on a Friday, the most expensive travel day of the week, you can expect to see flight prices from District of Columbia to London for around £621.

The cheapest time of day to fly to London is in the afternoon when flights can be purchased for as low as £522. Flights in the evening are often more expensive, with an average ticket price of £616.

Fly from Washington, D.C. Dulles Intl to London Heathrow for the best District of Columbia - London flight prices

You are more likely to see cheaper flights to London from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to London for around £600 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London from District of Columbia for as low as £535 on momondo.

There are 3 cabin classes available to choose from on District of Columbia to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Icelandair, JetBlue, and TAP AIR PORTUGAL are the most popular carriers operating from District of Columbia to London

British Airways, Virgin Atlantic and United Airlines are the top three most popular airlines that fly to London from District of Columbia according to our data. British Airways is the first choice among our users, with 50% of people opting to fly with this airline when travelling to London. Keep in mind that there are 5 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

28 flights are operational daily from District of Columbia to London as of June 2026. The most popular departure time for this route is 22:00, with 92% of flights per day taking off in the evening.

As of June 2026, there are 196 flights per week flying from District of Columbia to London. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.