Air Canada tends to have the best prices on flights from London to Washington DC Ronald Reagan Washington National Airport. But, remember that Washington DC Ronald Reagan Washington National 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.
Every week, there are 151 direct and indirect flights connecting Washington DC and London. On average, it takes 11 hrs 55 mins to fly the 5915 km between London and Washington DC.
At the moment, the cheapest date to travel on is 31 / May / 2020. You could also try searching by month, if you're flexible on dates. This will show you when prices are at their cheapest and their most expensive. Generally speaking, the earlier you book, the better deal you'll get.
Found your flights? Select the ones you want, then go through to the next stage to complete your booking. If you'd like to add car hire or a hotel for your trip to USA, you can do that too – simply use the tabs at the top of the page.