The fastest round the world flights will probably be the ones with BA/Qantas as they only have a touchdown in Singapore rather than a change of planes. Then a change of planes in LAX.
The earth is spining because it started to spin when the Eath was created. Since then not much has caused it to slow down since space is mostly a vacuum, so there isn't much friction to slow the...
The best way to get the cheapest round the world flight tickets is to consider the month of departure. For example, flights in June and November are cheap, whereas July and December are expensive....