What is, is there, a definition of 'round the world'?
It could vary from one extreme of spinning around through 360 degrees at the pole, to having to cover at least the distance of the equator.
Practically travelling from point A back to point A in a given direction, one of the quickest ways would surely be to minimise distance travelled. To do that one could travel for example, SEA-LHR-NRT-SEA with BA/NorthWest - three sectors with probably reasonably short connection times.
Looking it up quickly would give (all times local)
BA SEA 1820 -LHR 1200//1435 BA to NRT 1105//1525 NWA to SEA 0715
I reckon that to be about 38:55.
Last edited by TopBunk; 8th Mar 2007 at 15:10.