Cheap flights from the United Kingdom to Washington, D.C. from $369

The month of February is, on average, the cheapest month to fly to Washington, D.C. from United Kingdom, with most prices found around $662. If you’re not able to fly to Washington, D.C. in February, then January is your next best option. Flight prices from United Kingdom to Washington, D.C. during January average around $667.

On average, the least expensive day to fly to Washington, D.C. from United Kingdom is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $752. However, this price may fluctuate depending on the airline, the season, and holidays. 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. for around $857.

In the afternoon is the cheapest time of day to fly from United Kingdom to Washington, D.C. when you can find flight prices for as low as $768. Flying to Washington, D.C. in the afternoon is an ideal time because this is during off-peak travel hours. Try not to purchase tickets at noon because they tend to be around $810. Of course, these prices can vary depending on the time of year and what airport you fly to.

Fly from London Heathrow to Washington, D.C. Dulles Intl for the best United Kingdom - Washington, D.C. flight prices

You are more likely to see cheaper flights to Washington, D.C. from United Kingdom when booking weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around $728 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from United Kingdom for as low as $646 on momondo.

There are 3 cabin classes available to choose from on United Kingdom 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.

Icelandair, TAP AIR PORTUGAL, and United Airlines are the most popular carriers operating from United Kingdom to Washington, D.C.

British Airways, Aer Lingus and Lufthansa are the top three most popular airlines that fly to Washington, D.C. from United Kingdom according to our data. British Airways is the first choice among our users, with 35% of people opting to fly with this airline when traveling to Washington, D.C.. Keep in mind that there are 10 different airlines that fly to Washington, D.C. on a routine basis, so you have a few additional options to choose from.

Historically, on average around 16% 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 140 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights in the evening 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 10% of their flights experiencing any sort of delay.

As of October 2026, there are 18 flights per day flying from United Kingdom to Washington, D.C.. The most common time of day flights depart is 12:00PM, with 100% of flights taking off in the afternoon.

As of October 2026, there are 131 flights per week flying from United Kingdom to Washington, D.C.. The most common day of the week flights depart is Tue, with 21% of flights taking off on this day.