hi there, have spoken with the record holder myself in an effort to gain knowledge of his record as i would love to attempt this, he flew concorde to singapore via bahrain from london which shaves a few hours of the normal route so it would be hard to beat, the best i have come up with is 45 hours total (sorry not telling because i think i can beat it) but this means some connections at just under 30 mins so a lot of things need to go your way, his record was on 3 747 sections, 2 concorde, a300 airbus, and 2 dc8 journeys (you wont get that now ha)

the best time i found was 40 hours 5 mins but 1000 miles short, so have 4 hours to to cut in another leg of the journey to make up the distance