Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from London to Washington
Today’s flight suggestion for London - Washington
Outbound 10 December 2026 · Inbound 23 December 2026
Today’s suggestion
12:15
LHR 18:30
IAD11h 15m
1 stop
19:40
IAD 19:30 +1
LHR18h 50m
1 stop
From £387
20:35
LHR 18:30 +1
IAD26h 55m
1 stop
19:40
IAD 10:55 +1
LGW10h 15m
1 stop
From £389
16:20
LHR 20:15
IAD8h 55m
Direct
18:20
IAD 06:40 +1
LHR7h 20m
Direct
From £513
Cheapest flight
£378
Average price of a round trip
£386
Average price recorded over the last 3 months for a round trip.
Flight duration
8h17
A flight from London to Washington takes on average 8h17.
Best time
October
According to user searches, the ideal month to go to Washington is October.
What is the cheapest month for this flight?
Monthly price data (Table View)
November
Nov
£397
December
Dec
£514
January
Jan
£0
February
Feb
£397
March
Mar
£468
April
Apr
£0
May
May
£500
June
Jun
£466
July
Jul
£0
August
Aug
£1,144
September
Sept
£477
October
Oct
* The prices shown are an average per month of the prices found by Liligo users during the last 30 days.
Tips for finding cheap flights from London to Washington
Check out our tips for booking your flight to Washington (USA) from London (United Kingdom) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is April, with an average ticket price of £302 (calculation over the last two years). The most touristic season corresponds to the months of July, August and April.
For an attractive price, it is advisable to buy your flight tickets at least 12 days before the departure date.
The airline offering the cheapest tickets is Icelandair. A ticket from the company Icelandair to Washington costs on average £382.
The airlines that offer the most flights are .
Price of flight tickets from London to Washington
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from £378 to £398
- The average price of a flight ticket is about £386
- Prices are lowest for stays in the month of April
- The month in which booking a ticket is cheaper is: October
info departure city :
London, United Kingdom
airports :
London City Airport (LCY)
London Gatwick Airport (LGW)
London Heathrow Airport (LHR)
London Luton Airport (LTN)
London-Stansted Airport (STN)
local time :
London is a city in the country United Kingdom, the time zone is [[timezone]]. In London, it is currently {fromLocalTime}, the temperature is on average 8°C, with a minimum of 8°C and a maximum of 9°C.
The city of London (LON) has 5 airport(s): London City, London Gatwick, London Heathrow, London Luton and London-Stansted
destination info :
Washington, USA
airports :
Ronald Reagan Washington National Airport (DCA)
Dulles International Airport (IAD)
College Park Airport (CGS)
local time :
Washington is in the country USA, the time zone is [[timezone]]. In Washington, it is currently {toLocalTime}, the temperature is on average 12°C, with a minimum of 6°C and a maximum of 19°C.
The city of Washington (WAS) has 3 airport(s): Ronald Reagan Washington, Dulles and College Park
Useful info about Washington
What is the least touristic period to go to Washington?
If you want to visit Washington during the least touristic period, choose the month of October.
What is the most popular time to travel to Washington?
In Washington, the most touristic month is July. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight London - Washington?
According to our data, it is recommended to book your flight 12 days before your departure. If you book your flight ticket 2 weeks before your departure, you may find a price below average. The cheapest day to book a flight London - Washington is Wednesday.
What are the arrival and destination airports when travelling between London and Washington?
When you leave, you can leave from London Heathrow or London-Stansted, and you will arrive at .
How to reach London airport from the city centre?
The airport London City is located 16 km, London Gatwick is located 38 km, London Heathrow is located 35 km, London Luton is located 45 km or London-Stansted is located 49 km from the city centre. You can access it by using public transport, taking a taxi, or renting a car..
Are there other means of transport to go from London to Washington?
Flights are the only means of transport listed on Liligo for this journey.
Are there big differences in weather between London and Washington?
In summer, the average temperature is 25°C in Washington and 18°C in London. The average rainfall in summer is 133 mm in Washington and 63 mm in London.In summer, it is warmer in Washington and it rains less in London. In winter, it is colder in London and it rains more in Washington.
