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 691 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 British Airways 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 21 / Mar / 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.
