Fly from Washington DC to London for $335 round-trip on Air Canada.
Seen below, we found seats departing DCA on Tuesday, March 1, returning from LHR on Wednesday, March 9. Flights connect via Toronto YYZ.
Other dates are also available for travel from October through March.
For booking info, see our fare details.
Need a room in London? Here's what's available on Hotelwatchdog for the above dates.