We live in Australia and regularly visit family in England. We have travelled to Fort Lauderdale a few times to join a cruise. We are doing it again in April next year (TAP). From here to FLL there is no doubt that the shortest flying time, imoprtant to us, is from east coast of Australia to LAX or SFO then over to FLL. This is about 10 hours less flying time than via London! Unless you have a reason to visit London I would recommend going via LAX then direct to Sydney with Qantas or United. A night stop in LAX will refresh you for the long flight across the Pacific. Hope this helps.