What is the cheapest round trip ticket to Cambridge in the UK, if i am in Richmond Virginia?

Question

I would want to go between June to August.

i need it to be as cheap as possible.

Answer 1

$730 r/t total RIC-LHR via Toronto with Air Canada *IF* outbound by June 4.  This is a superb sale fare, and by far the cheapest fare in the area.  I also checked from Norfolk, DC airports, Newport News, and Charlottesville, and to all 5 London airports as well as Birmingham BHX.  Stansted is the closest to Cambridge, but only flights there are with American connecting at JFK Airport in New York, and they're not cheap currently ($1097).  

From Heathrow, you can take http://www.nationalexpress.com to Cambridge.