Cheap Flights from London to Washington Dulles

Compare London to Washington Dulles flight deals

Find the cheapest month or even day of the year to fly to Washington Dulles

Book the best Washington Dulles fare with no extra fees

Flight deals from London to Washington Dulles

Looking for a cheap last-minute deal or the best return flight from London Airport to Washington Dulles Airport? If you want to travel next month, return fares start from R 11,849. Find the lowest prices on one-way and return tickets right here.

Find the cheapest month to fly from London to Washington Dulles

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like London to Washington Dulles flights are currently cheapest in July.

London to Washington D.C.: Flight information

The things to know before you go.
Cheapest flight foundR 3,911
Cheapest month to flyJuly

Finding cheap flights from London to Washington Dulles: Frequently asked questions

The best price we found for a return flight from London to Washington Dulles is R 11,849. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from London to Washington Dulles. But we found flights with one or more stops from R 11,849.
As of June 2026, there are no flights flying from London to Washington Dulles.
The cheapest month to fly from London to Washington Dulles is usually July.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from London Airport to Washington Dulles Airport on Friday, 10 July 2026.
No airlines currently offer direct flights between London Airport and Washington Dulles Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Washington Dulles but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Washington D.C. is around 40 days in advance, so don’t leave your flight to the last minute.

Currently, Air Canada offers the cheapest flight tickets to Washington Dulles.

Travelling from London International Airport (YXU) to Washington Dulles International Airport (IAD): what you need to know

  • Washington DC's timezone is UTC-4, which is the same as London.

  • To ensure you catch your YXU to IAD flight, leave plenty of time for things like baggage drop and finding your gate. Turning up two hours ahead of international departures and one hour before domestic flights is the general travel rule.

  • During popular months like August, you'll want to get to the airport earlier. Plan to arrive two hours before a domestic departure and four hours ahead for an international flight when you fly during a peak period in general.

How to find the cheapest flights from London International Airport (YXU) to Washington Dulles International Airport (IAD)

  • Right now, R 3,911 is the cheapest price we've seen for a one-way London International Airport to Washington Dulles International Airport flight. The best price for a return plane ticket is R 11,849. Keep in mind that fares can change due to availability at the time of booking.

  • To pick up cheap tickets from YXU to IAD, book in advance. Airlines generally offer lower prices when flights are first made available.

  • If you can be flexible with your trip dates, use the 'Whole month' search tool. It'll give you the cheapest price in each month when looking for a flight from London International Airport to Washington Dulles International Airport.

  • Spend less time searching for cheap flights from YXU to IAD by setting up a Price Alert. You'll receive an email or push notification on the app when a lower fare becomes available.

  • Tailor your flights using filters. Pick your ideal departure and arrival times, total journey duration and airlines. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest' flights from London International Airport to Washington Dulles International Airport.

Handy information about London International Airport (YXU)

  • 50.41% of flights departing from London International Airport touch down at their destination on schedule.

  • To get to London International Airport from central London, it'll take around 20 minutes by car. Of course, this depends on traffic conditions. It's approximately 11 kilometres from the airport to the city centre.

  • Planning to take public transport? Expect a journey time of around 55 minutes.

  • Looking for a handy hotel close to YXU? If you're catching an early flight from London International Airport to Washington Dulles International Airport, these accommodation options will have you sleeping moments from your departure gate:

Arriving at Washington Dulles International Airport (IAD)

Getting from Washington Dulles International Airport (IAD) to central Washington DC

  • IAD is located at 1 Saarinen Circle.

  • From Washington Dulles International Airport, Washington DC is approximately 56 kilometres away. It takes around 50 minutes to get to the centre driving.

  • It typically takes 3 hours 25 minutes if you're using public transport.

When to fly to Washington Dulles International Airport (IAD)

  • It's time to plan your dates for your flight from London International Airport to Washington Dulles International Airport. April is the busiest month to visit Washington DC. If you want a more low-key vibe, go in January.

  • The warmest month in Washington DC is July, with temperatures ranging between 19ºC (66ºF) and 33ºC (91ºF). Book your flights from London International Airport to Washington Dulles International Airport in this month if this is the kind of weather you like.

  • January sees average temperatures of between -6ºC (21ºF) and 10ºC (50ºF). Search for cheap tickets from YXU to IAD sometime around then if you like travelling in cooler conditions.

Explore more of United States

  • Washington DC has its own special appeal, but there are so many other parts of United States just waiting to be discovered. About 322 kilometres north-east of Washington DC, a visit to New York will keep you busy. Start with leading attractions like Statue of Liberty, Central Park and Empire State Building.

  • If you're interested in discovering another major stop in United States, consider Philadelphia, roughly 193 kilometres north-east of Washington DC. Liberty Bell, Independence Hall and Philadelphia Museum of Art are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.