Featured airlines
Cheap Flights from Washington to London (IAD-YXU)
Prices were available within the past 7 days and start at $257 for one-way flights and $559 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.
Origin airport | Washington Dulles Intl. |
Destination airport | London Intl. |
Airlines serving | Air Canada, United, WestJet |
Roundtrip price | $559 |
Distance | 341 mi |
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 May. 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 2025. You can also book with separate airlines for your outbound and return journeys, from $257 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.
Frequently asked questions
Explore a world of travel with Expedia
Flights
- United Washington (IAD) to Los Angeles (LAX) flights
- United Washington (IAD) to Fort Lauderdale (FLL) flights
- avianca Washington (IAD) to Guatemala City (GUA) flights
- Etihad Airways Washington (IAD) to Delhi (DEL) flights
- Frontier Airlines Washington (IAD) to Orlando (MCO) flights
- United Washington (IAD) to Houston (IAH) flights
- United Washington (IAD) to Miami (MIA) flights
- United Washington (IAD) to Dallas (DFW) flights
- Air Canada Washington (IAD) to Tokyo (NRT) flights
- Air Canada Calgary (YYC) to London (YXU) flights
- Air Canada Chicago (ORD) to London (YXU) flights
- Flights to Vancouver
- Flights to London
- Flights to Calgary
- Flights to Montreal
- Flights to Richmond
- Flights to Winnipeg
- Flights to Québec City
- Flights to Canmore
- Flights to Mont-Tremblant
- Flights to Edmonton
- Flights to Toronto
- Flights to Niagara Falls
- Flights to Saskatoon
- Flights to Whistler
- Flights to Kelowna
- Flights to Halifax
- Flights to Banff
- Flights to Victoria
- Flights to Ottawa
- Flights to The Blue Mountains
- Flights from Manassas Regional
- Flights from College Park
- Flights from Easton - Newnam
- Flights from Baltimore Washington Intl. Thurgood Marshall
- Flights from Hagerstown Regional
- Flights from Ronald Reagan Washington National
- Flights from Tipton
- Flights from Montgomery County Airpark
- Flights from Martin State
- Flights from Eastern West Virginia Regional
- Flights from Washington (IAD) to Punta Cana (PUJ)
- Flights from Toronto (YYZ) to Calgary (YYC)
- Flights from Washington (IAD) to Los Angeles (LAX)
- Flights from Washington (IAD) to Fort Lauderdale (FLL)
- Flights from Norfolk (ORF) to Atlanta (ATL)
- Flights from Richmond (RIC) to Atlanta (ATL)
- Flights from Washington (IAD) to Hyderabad (HYD)
- Flights from Washington (IAD) to Guatemala City (GUA)
- Flights from Washington (IAD) to Delhi (DEL)
- Flights from Toronto (YYZ) to New York (NYC)
- Flights from Richmond (RIC) to Orlando (MCO)
- Flights from Norfolk (ORF) to Orlando (MCO)
- Flights from Toronto (YYZ) to Vancouver (YVR)
- Flights from Washington (IAD) to Paris (CDG)
- Flights from Washington (IAD) to Houston (IAH)
- Flights from Richmond (RIC) to Miami (MIA)
- Flights from Washington (IAD) to Miami (MIA)
- Flights from Washington (IAD) to Dallas (DFW)
- Flights from Washington (IAD) to Tokyo (NRT)
- Flights from Norfolk (ORF) to Las Vegas (LAS)
- Flights from Richmond (RIC) to Las Vegas (LAS)
- Flights from Washington (IAD) to Tampa (TPA)
- Flights from Chicago (ORD) to Toronto (YYZ)
- Flights from San Francisco (SFO) to Toronto (YYZ)
- Flights from Houston (IAH) to Toronto (YYZ)
- Flights from New York (NYC) to Toronto (YYZ)
- Flights from Seattle (SEA) to Toronto (YYZ)
- Flights from Los Angeles (LAX) to Toronto (YYZ)
- Flights from Newark Liberty Intl. Airport (EWR) to Toronto (YYZ)
- Flights from Lahore (LHE) to Toronto (YYZ)
- Flights from Accra (ACC) to Toronto (YYZ)
- Flights from Nairobi (NBO) to Toronto (YYZ)
- Flights from Dhaka (DAC) to Toronto (YYZ)
- Flights from Orlando (MCO) to Toronto (YYZ)
- Flights from Manila (MNL) to Toronto (YYZ)
- Flights from Dallas (DFW) to Toronto (YYZ)
- Flights from Boston (BOS) to Toronto (YYZ)
- Flights from New York (LGA) to Toronto (YYZ)
- Flights from Atlanta (ATL) to Toronto (YYZ)
- Flights from Lagos (LOS) to Toronto (YYZ)
- Flights from New York (JFK) to Toronto (YYZ)
- Flights from Port of Spain (POS) to Toronto (YYZ)
- Flights from Newark Liberty Intl. Airport (EWR) to London (YXU)
- Flights from Calgary (YYC) to London (YXU)
- Flights from Phoenix (PHX) to London (YXU)
- Flights from Los Angeles (LAX) to London (YXU)
- Flights from Boston (BOS) to London (YXU)
- Flights from Detroit (DTW) to London (YXU)
- Flights from New York (LGA) to London (YXU)
- Flights from Chicago (ORD) to London (YXU)
- Flights from Montreal (YUL) to London (YXU)
- Flights from Houston (IAH) to London (YXU)
- Flights from Honolulu (HNL) to London (YXU)
- Flights from New York (JFK) to London (YXU)
- Alaska Airlines
- Air Canada
- avianca
- Delta
- Emirates
- KLM
- Etihad Airways
- Qatar Airways
- Air France
- American Airlines
- Turkish Airlines
- Swiss International Air Lines
- British Airways
- United
- Frontier Airlines
- Lufthansa