Cheap flights from District of Columbia to London from $274

The cheapest month to fly to London from District of Columbia is in February. Flight prices, which tend to average around $664, are often lower during this time because this is during the off-season. The month of January is another great option to travel to London, with average flight prices from District of Columbia averaging around $690.

The cheapest day to depart from District of Columbia to London is on a Wednesday. Travelers who choose to depart for London on a Wednesday will often find tickets for as low as $857. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $962. These prices are subject to change though, so be sure to set up a Price Alert for flights to London.

Flying to London from District of Columbia in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $878 when looking at flights departing in the afternoon. Flights to London are more costly in the evening, with an average ticket price of $941. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

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 $855 when searching weeks out. 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 $780 on momondo.

There are 4 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, United Airlines, and JetBlue are the most popular carriers operating from District of Columbia to London

British Airways, United Airlines and American 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 51% of people opting to fly with this airline when traveling to London. Keep in mind that there are 18 different airlines that fly to London on a routine basis, so you have a few additional options to choose from.

As of July 2026, 26 flights take off from District of Columbia and land in London each day. The most common flight departure time for this route is 10:00PM, with 85% of daily flights taking off in the evening.

As of July 2026, 188 flights take off from District of Columbia and land in London each week. The most common flight departure day for this route is Mon, with 15% of weekly flights taking off on this day.