Cheap flights from London to Washington DC Washington Dulles International Airport

from as little as £474

2 nights in Washington DC, departing London Heathrow on 26 / Apr / 2025 with Icelandair (price found 5 hours ago)

Subject to availability, prices correct of the last 24 hours
Washington DC Washington Dulles International Airport

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The London / Washington DC Washington Dulles International Airport route

All 5936 km of it

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Washington DC Washington Dulles International Airport flight facts

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Alternative flights from the UK to Washington DC Washington Dulles International Airport

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Washington DC Washington Dulles International Airport

Today alone, Netflights has searched over 13,540 flights. 26 / Apr / 2025 is currently the lowest priced day of the year to fly the London/Washington DC Washington Dulles International Airport route. There are around 289 flights on any given week from the UK to Washington DC Washington Dulles International Airport and the cheapest month to fly right now is April.

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Min / Max Temperature (°C)
LOWEST

-4 °C

AVG

13 °C

HIGHEST

31 °C

Rainfall (mm)
LOWEST

68.6 mm

AVG

88.3 mm

HIGHEST

116.8 mm

Key facts about Washington DC Washington Dulles International Airport

How to get cheap flights from London to Washington DC Washington Dulles International Airport

Tips and advice from our flight experts

Icelandair tends to have the best prices on flights from London to Washington DC Washington Dulles International Airport. But, remember that Washington DC Washington Dulles International Airport is only one of the airports in Washington DC – searching for flights from ‘London’ to ‘Washington DC’ will give you more options, and possibly lower prices.

There are 289 flights to or via Washington DC from London. The flight normally lasts about 5936 km. We've found that London Heathrow (LHR) is the most popular airport to fly from, and Air Canada is the most popular airline. But that doesn't mean they'll be the cheapest – it's best to compare all your options.

Prices vary throughout the year but, right now, the cheapest date to fly is 26 / Apr / 2025. If you're looking for a budget break to the USA and are flexible on dates, search for flights by month to find the best offers.

We don't just compare flight prices. If you need to book accommodation for your trip, or you want to hire a car to explore the USA, we've got some options for you to compare. Plus, when you sort your flights and hotel in one booking, you could save even more.

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