Flights from Washington DC to London Heathrow

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Our cheapest offers for flights from Washington DC to London Heathrow

Here you can compare cheap flights from Washington DC (IAD) to London Heathrow (LHR) for one-way or return trips. The following offers were searched for and found on idealo during the last few days. Or start your own flight search to London Heathrow. Prices and availability may change at any time.

Please use our search to find current cheap offers for the following route: from Washington DC (IAD) to London Heathrow (LHR)
You can also change your filters (Departure airport: Washington DC (IAD), Destination airport: London Heathrow (LHR)) or look for alternative cheap flights.

Tips and tricks to help you find cheap flights from Washington DC to London Heathrow

Tip: book 6 weeks before departure
The best time to find a cheap flight on this route is 6 weeks before travel. Save up to 46 %.
45 days before departure

Flight information: Washington DC - London Heathrow

Flight duration min. 07:00 / max. 07:25
Return flight duration min. 08:20/ max. 08:45
Distance 5908 km
Flights per week 52
Departure airport Washington DC - Dulles International Airport, DC (IAD)
Departure country United States
Arrival airport London Heathrow (LHR)
Destination country United Kingdom
Alternative flights to London Heathrow
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* Prices may vary, please check the travel details given by the online travel agency before booking. Prices include taxes.