The Average value for all direct flights, flights with a person stopover, and flights with two stopovers for the route located by people exploring on KAYAK in the final two weeks. Here is the cheapest 1-way flight price tag observed by a KAYAK consumer in the last 72 several hours https://whitemagictravels.co.uk/blog/get-tickets-for-flights-to-washington-from-uk-to-explore-the-top-tourists-attractions-of-dc/