find me a cheap flight!

I need someone who can find at least one airplane ticket for 500 dollars round trip.(more than one would be great.) The location can be from anywhere in the united states, but the destination has to be London, United Kingdom or Paris, France. Also, the dates are June 22-24 departure and June 26-28 return. So to verify: the fare cannot exceed 500 it can come from anywhere in the USA the destination must be London, United Kingdom or Paris, France departure dates should be June 22-24 return dates should be June 26-28 Since it is a simple search job, I will pay via freelancer, and I will need solid proof that this fare exist. (Bonus: If you can find a round trip ticket for 300 dollars from Richmond, Va to London, United Kingdom with departure of June 24 and return of June 26, I will pay you an extra 10 dollars. If it can be put on hold, even better, and another 10 dollars for you.)