Fly nonstop from Washington DC to London for $578 round-trip on Virgin Atlantic.
Searching Virgin Atlantic, we found seats departing IAD on Thursday, September 15, returning from LHR on Thursday, September 22.
Other dates are also available for travel from September through October.
See our fare details for booking info.
Need a room in London? Here's what's available for the above dates on Hotelwatchdog.