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Not ready to book? to track prices.Find the cheapest flights from London to Washington, D.C.
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KLM flights from London to Washington, D.C.
Our best KLM deals on London to Washington, D.C. flight tickets
SWISS flights from London to Washington, D.C.
Our best SWISS deals on London to Washington, D.C. flight tickets
See travel insights to Washington, D.C. from
How to get the cheapest flight ticket from London to Washington, D.C.
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the typical price of a round-trip flight between London and Washington, D.C.?
What is the cheapest month to fly to Washington, D.C.?
The cheapest month to fly to Washington, D.C. from London is in February. Flight prices, which tend to average around €549, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Washington, D.C. from London during September instead. Flights to Washington, D.C. in September, while not as cheap as those in February, still average around €575.
What is the cheapest time of day to depart on your flight to Washington, D.C.?
Flying to Washington, D.C. from London in the morning is the least expensive time of day to depart. momondo users have found prices as low as €875 when looking at flights departing in the morning. If you have a flexible travel schedule, then try to avoid flying in the afternoon when prices are €901 on average. Flights to Washington, D.C. from London in the afternoon are generally more expensive because this time of day is more convenient for travellers’ schedules.
How far in advance should I book a flight to Washington, D.C.?
You are more likely to see cheaper flights to Washington, D.C. from London when booking 24 weeks ahead of your departure date. In general, you can expect to find flights to Washington, D.C. for around €728 when searching 24 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Washington, D.C. from London for as low as €652 on momondo.
How have London to Washington, D.C. flight prices changed over time?
As of May 2025, prices for London to Washington, D.C. flights are approximately 29% more expensive when compared to flights at the same time last year.
How many flights depart from London to Washington, D.C. on average per day?
As of May 2025, 24 flights take off from London and land in Washington, D.C. each day. The most common flight departure time for this route is 12:00, with 100% of daily flights taking off in the afternoon.
How many flights depart from London to Washington, D.C. on average per week?
As of May 2025, there are 171 flights per week flying from London to Washington, D.C.. The most common day of the week flights depart is Thu, with 19% of flights taking off on this day.
When to book flights from London to Washington, D.C.
Cheap London to Washington, D.C. (LON to WAS) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London to Washington, D.C.
Best price found | €548 |
|---|---|
Fastest flight time | 8h 00m |
Direct flights | Every day |
Airports in Washington, D.C. | 2 airports |
How far is London to Washington, D.C. by plane?
A flight from London to Washington, D.C. will travel around 5893.9 km. By plane, this route typically takes 8h 00m.
When did momondo last update prices for flights from London to Washington, D.C.?
Prices for flights from London to Washington, D.C. refresh daily.
How old do you have to be to fly from London to Washington, D.C.?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Washington, D.C..
What documentation or ID do you need to fly to Washington, D.C.?
The required travel and health documents for your Washington, D.C. trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's licence and a passport valid for six months after your intended arrival at Washington, D.C.. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
What is the most popular plane model from London to Washington, D.C.?
momondo data reveals that the most frequently booked plane model on the route from London to Washington, D.C. is Boeing 777, representing 30.79% of all bookings. The subsequent popular models are Airbus A380-800 at 14.10%, Boeing 777-300ER at 11.04%, and Airbus A330-900neo at 8.97%.
Travelling to a place near Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from London to Washington, D.C.?
To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Washington, D.C. from London.
Can I find flights from London to Washington, D.C. with flexible booking policies on momondo?
Yes. momondo enables you to select and highlight flights to Washington, D.C. from London with this policy.
How can momondo help me find flights from London to Washington, D.C.?
Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from London.
I’m not ready to book a flight from London to Washington, D.C. right now. Can momondo alert me if prices change?
If you are simply researching potential flights to Washington, D.C., momondo offers a useful price alert feature which will track prices for flights to Washington, D.C. from London and alert you when they change.