Direct flights available:
184 PER WEEK
Popular non-direct routes for this connection are Heathrow - Keflavik Intl - Dulles Intl, Heathrow - Copenhagen Airport - Dulles Intl and Gatwick - Keflavik Intl - Dulles Intl.
You can fly from London to Washington DC indirect via Keflavik Intl, Copenhagen Airport or Dublin.
Direct flights available on