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Cheap flights from Washington (IAD) to London (LCY)
Prices were available within the past 7 days and start at $405 for one-way flights and $542 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Travel information
Travel information
Origin airport | Washington Dulles Intl. |
Destination airport | London City |
Airlines serving | Aer Lingus, British Airways, Delta, ITA Airways, Iberia, KLM, Lufthansa, Swiss International Air Lines, Virgin Atlantic |
Roundtrip price | $541 |
Distance | 3686 mi |
Book with confidence
Book with confidence
Washington to London Flights
The cheapest times to fly from Washington to London
On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to London are during the month of October. You can find some of the cheapest flights from Washington to London with Expedia's search tool and vast selection of airlines.
The best time to book a flight from Washington to London
Sunday is one of the best days to book for cheap flights from Washington to London: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.
How to find cheap round-trip tickets from Washington to London
Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to London in 2024. You can also book with separate airlines for your outbound and return journeys, from $405 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.
Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to London flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.
You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to London airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.
*Terms apply.
Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.
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Frequently asked questions
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Top Routes from Washington
- Washington to Mumbai (IAD - BOM)
- Washington to San Diego (IAD - SAN)
- Washington to Los Angeles (IAD - LAX)
- Washington to Punta Cana (IAD - PUJ)
- Washington to Miami (IAD - MIA)
- Washington to Paris (IAD - CDG)
- Washington to Delhi (IAD - DEL)
- Washington to Seattle (IAD - SEA)
- Washington to Hyderabad (IAD - HYD)
- Washington to Guatemala City (IAD - GUA)
- Washington to Rome (IAD - FCO)
- Washington to Lisbon (IAD - LIS)
Top Routes to London
- Chicago to London (ORD - LCY)
- Newark Liberty Intl. Airport to London (EWR - LCY)
- Los Angeles to London (LAX - LCY)
- Miami to London (MIA - LCY)
- Tampa to London (TPA - LCY)
- Detroit to London (DTW - LCY)
- Boston to London (BOS - LCY)
- Fort Lauderdale to London (FLL - LCY)
- Minneapolis to London (MSP - LCY)
- New York to London (JFK - LCY)
- Seattle to London (SEA - LCY)
- Zürich to London (ZRH - LCY)
Top Routes from Washington
- Alaska Airlines Washington to San Diego
- Alaska Airlines Washington to Los Angeles
- United Washington to Punta Cana
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- Emirates Washington to Delhi
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- Emirates Washington to Hyderabad
- Avianca Washington to Guatemala City
- TAP Portugal Washington to Lisbon
- United Washington to Orlando
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Main Airports for Flights
- Manassas Regional Airport (MNZ)
- Montgomery County Airpark Airport (GAI)
- Ronald Reagan Washington National Airport (DCA)
- College Park Airport (CGS)
- Tipton Airport (FME)
- Eastern West Virginia Regional Airport (MRB)
- Baltimore Washington Intl. Thurgood Marshall Airport (BWI)
- Hagerstown Regional Airport (HGR)
- Martin State Airport (MTN)
- Easton - Newnam Airport (ESN)