Cheap flights from District of Columbia to London from £245

In general, August is the cheapest month to fly from District of Columbia to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £487. The month of September is another great option to travel to London Heathrow Airport, with average flight prices from District of Columbia averaging around £490.

On average, the least expensive day to fly to London Heathrow Airport from District of Columbia is on a Sunday. momondo users have found tickets for Sunday departures for as low as £526. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Thursday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Thursday is £603.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the afternoon. momondo users have found flights departing from District of Columbia to London Heathrow Airport in the afternoon for as low as £544. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are £572 on average. Flights to London Heathrow Airport from District of Columbia in the evening are generally more expensive because this time of day is more convenient for travellers’ schedules.

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

You are more likely to see cheaper flights to London Heathrow Airport from District of Columbia when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £567 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from District of Columbia for as low as £527 on momondo.

There are 4 cabin classes available to choose from on District of Columbia to London Heathrow flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

JetBlue, British Airways, and Delta are the most popular carriers operating from District of Columbia to London Heathrow

British Airways, Virgin Atlantic and United Airlines are the top three most popular airlines that fly to London Heathrow Airport from District of Columbia according to our data. British Airways is the first choice among our users, with 49% of people opting to fly with this airline when travelling to London Heathrow Airport. Keep in mind that there are 8 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

21 flights are operational daily from District of Columbia to London Heathrow Airport as of March 2026. The most popular departure time for this route is 18:00, with 100% of flights per day taking off in the evening.

As of March 2026, there are 153 flights per week flying from District of Columbia to London Heathrow Airport. The most common day of the week flights depart is Mon, with 14% of flights taking off on this day.