£276 Cheap British Airways flights from Washington to London (IAD→LHR)

View £276 flight on Sun, 28 Sept 2025Opens in a new window
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British Airways flights from Washington to London (IAD→LHR)

Prices were available within the past 7 days and start at £276 for one-way flights and £434 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Mon, 13 Oct - Wed, 22 Oct
IAD
Washington
LHR
London
£434 Return, found 2 days ago
£434
Return
found 2 days ago
Select British Airways flight, departing Mon, 13 Oct from Washington to London, returning Wed, 22 Oct, priced at £434 found 2 days ago
Flight from Washington to London route information
Origin airport
Washington Dulles Intl.
Destination airport
Heathrow
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Royal Air Maroc, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United, Virgin Atlantic
Popular airline
British Airways
Distance
5866 km
Average flight time
12 hours 21 mins

Frequently asked questions

How much is a British Airways flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
Set the "Price (lowest to highest)" filter on Expedia to find cheap British Airways round-trip flights from £434 from IAD to LHR. Affordable one-way options from £276 are also available.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to LHR with British Airways?
January is one of the cheapest months to fly to London with British Airways. You could also find fantastic deals on return and one-way tickets in February.
Does British Airways fly nonstop from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
Depart on one of British Airways's 14 weekly direct flights from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR). To see what's available, enter your travel dates, origin and destination and hit search. Next, apply the "Nonstop" and "Airline" filters.
How long does it take to fly from IAD to LHR with British Airways?
The journey time for a direct British Airways flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR) takes around 7h 11m.
Which day of the week has the most British Airways flights from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
Thursday has the most British Airways flights from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR). With 2 daily departures, this is the best day of the week to book something that will suit your plans.
What airports does British Airways fly into in London?
British Airways flights from Washington Dulles Intl. Airport (IAD) to London come in to Heathrow Airport (LHR). This is the main entry point to this city.
What kind of luggage can I take on a British Airways flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
On a standard economy flight with British Airways from IAD to LHR, passengers can bring 1 checked-in bag up to 23 kg (50 lbs) with dimensions not exceeding 89 centimetres x 41 centimetres x 74 centimetres in total. For hand luggage, you're permitted 1 cabin bag weighing up to 23 kg (50 lbs) and measuring no more than 56 centimetres x 23 centimetres x 43 centimetres. Weight and size restrictions can vary based on your cabin class and airfare type. To make sure you're not hit with extra charges at the airport, check your British Airways booking or look up the airline's website before you start packing.
What type of plane does British Airways fly from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
For the Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR) route, British Airways typically uses Airbus A350-1000 and Boeing 777 planes. Keep in mind that last-minute changes can occur for operational purposes, so your flight could be on another aircraft.
Can I change or cancel my British Airways flight from Washington Dulles Intl. Airport (IAD) to Heathrow Airport (LHR)?
Depending on the type of ticket you purchased, a fee is typically charged if you cancel or change your flight more than 24 hours after it's confirmed. To secure plane tickets with more flexibility, select our "Changes included" and "No cancel fee" boxes while searching for flights. For more information on changing or cancelling your reservation, go to "Trips," select your flight and click on "Manage Booking."
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