373 - 813 GBP
Travelling from most locations, it is best to book your flight to Washington during the month of February for the best deal, although there are other times of the year which offer great deals as well.
Most flyers found that booking flight tickets 60 days in advance of their planned departure date is, on average, the best time to get cheap flights to Washington.
In general, booking your departure to Washington for a Thursday represents the best deal on airfare. Try to avoid a Sunday departure to stay away from the highest prices.
In general, when looking for the cheapest flight to Washington, our data indicates that afternoon flights are the most cost-effective. midday flights tend to be the most expensive.