Cheap flights from London to Washington, D.C. from £200
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/9. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from London to Washington, D.C. are usually found in February or November, booked 84 days in advance, depart on a Wednesday or Thursday and return on a Tuesday
Cheap flight deals from London to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from London (LON) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 July 2025.
Round-trip from | £481 |
---|---|
One-way from | £200 |
Popular in | July |
Cheapest in | February |
Average price | £654 |
Good round-trip deal | £501 or less |
Good one-way deal | £587 or less |
Find flight deals from London to Washington, D.C.
Cheapest flights from London to Washington, D.C.Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.
Explore the most affordable flight options available from London to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from London to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 July 2025.
Use the filters below to find and compare flights from London to Washington, D.C. that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
Thu 21/8
10:35-15:20
1 stop33h 45m
Washington, D.C. Dulles Intl
Sun 24/8
17:45-15:10
1 stop16h 25m
LondonWashington, D.C.
LGW - DCA
LGWDCA
London Gatwick
Fri 10/10
12:10-20:51
1 stop13h 41m
Washington, D.C. Reagan-National
Tue 14/10
16:39-09:35
1 stop11h 56m
LondonWashington, D.C.
LCY - IAD
LCYIAD
London City
Tue 16/9
08:40-15:35
1 stop11h 55m
Washington, D.C. Dulles Intl
Tue 23/9
09:50-07:15
2 stops16h 25m
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Sun 17/8
12:40-09:37
2 stops25h 57m
Washington, D.C. Dulles Intl
Wed 17/9
17:47-12:20
1 stop13h 33m
LondonWashington, D.C.
LGW - IAD
LGWIAD
London Gatwick
Sun 10/8
15:40-19:20
1 stop32h 40m
Washington, D.C. Dulles Intl
Fri 15/8
23:15-11:45
1 stop31h 30m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
Sun 7/9
08:15-19:21
1 stop16h 06m
Washington, D.C. Reagan-National
Sat 13/9
13:35-06:30
1 stop11h 55m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
Sun 7/9
09:45-23:07
1 stop18h 22m
Washington, D.C. Reagan-National
Sat 13/9
19:23-21:40
1 stop21h 17m
LondonWashington, D.C.
LHR - IAD
LHRIAD
London Heathrow
Thu 23/10
06:40-19:59
1 stop18h 19m
Washington, D.C. Dulles Intl
Thu 30/10
21:30-16:00
1 stop14h 30m
LondonWashington, D.C.
LHR - DCA
LHRDCA
London Heathrow
Mon 8/9
09:30-15:51
1 stop11h 21m
Washington, D.C. Reagan-National
Thu 11/9
12:55-06:30
1 stop12h 35m
LondonWashington, D.C.
LCY - IAD
LCYIAD
London City
Thu 28/8
08:45-15:15
1 stop11h 30m
Washington, D.C. Dulles Intl
Wed 10/9
20:45-12:30
1 stop10h 45m
Best time to book a flight from London to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from London with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from London to Washington, D.C.
How far ahead should I book a flight from London to Washington, D.C.?
Use this chart to determine the optimal time to book a return flight from London to Washington, D.C.. Price data was last updated on 27 June 2025.
Booking 84 days in advance of your planned departure date is, on average, the best time to get cheap flights from London to Washington, D.C.. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from London to Washington, D.C.?
Currently, January is the cheapest month in which you can book a flight from London to Washington, D.C. (average of £599). Flying from London to Washington, D.C. in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from LON to WAS?
Find hourly flight availability from London to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.
A simple way to save on the total cost of your ticket is to fly from London to Washington, D.C. in the evening. If you’re flexible enough to do this you can expect to save up to 22% on your trip compared to booking a flight in the afternoon.
What is the cheapest day to fly from London to Washington, D.C.?
Use this chart to determine the cheapest time to fly return from London to Washington, D.C.. Price data was last updated on 23 June 2024.
Travellers seeking maximum savings on their London to Washington, D.C. flight should consider departing on Tuesday evenings when fares are most often at their lowest. Sunday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.
Weekly flight availability from London to Washington, D.C.
Explore weekly flight availability from London to Washington, D.C.. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 4 July 2025.
The most flights from LON to WAS are scheduled on a Wednesday (27 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (16 on average).
How much does it cost for a return flight from London to Washington, D.C.?
Reviews of airlines servicing Washington, D.C.
Get insights into the airlines that provide service to Washington, D.C.. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington, D.C.. Reviews last updated 4 July 2025.
Check out reviews from past customers who have flown with Delta, KLM, andAustrian Airlines from London to Washington, D.C. to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Comfort
Food
Overall
Crew
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from London to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Fly from London to Washington, D.C. on these airlines
Choose from the following airlines for your flight from London to Washington, D.C.. Flights are based on user searches made on Cheapflights and were last updated on 4 July 2025.
Top 10 airlines flying from London to Washington, D.C.
Discover the top 10 airlines that operate flights from London to Washington, D.C.. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 4 July 2025.
Fly with Cheapflights
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How does Cheapflights help users find flights from London to Washington, D.C.?
When you search for this flight from London to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from London to Washington, D.C.?
Cheapflights simply makes it quick and affordable to book flights from London to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from London to Washington, D.C. with no change fees?
Need flexible booking options for your flight to Washington, D.C. from London? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.
Can Cheapflights notify me if prices for flights from London to Washington, D.C. become cheaper?
Of course! You can now track prices for flights from London to Washington, D.C. and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.