If it seems to good to be true, it is. Crap outfit with origins in Latvia. No interline arrangements either when things go wrong (and they often will
It isn't actually that cheap. The fare price of your actual seat (price minus taxes and fees) at current conversion is ~£46.92. A quick search for a Virgin Atlantic return leg flight shows a fare price of £49 and BA £57.
Good luck traveling to New York on a one way ticket!!!