hi jenn - flight times from london are around 8 hours I think and the price depends on when you book and what month anything from £500-£800 if you buy flights separate. It is cheaper for UK guests to combine a package with a tour operator i.e. virgin holidays or thomas cook.
at least i now know and wont invest any more of my time with her, was very rash and even deleted her from facebook - strange that her mum and sister are coming to the hen and to jamaica - its a very strange world - so excited!