來回美國的飛行時間差異

No, the big flying time difference in outbound and inbound flights to America is because there is a strong jetstream above Japan and the Bering Strait, blowing towards Alaska. When flights fly to America, their direction is parellel with the jetstream, letting the jetstream increase the aircraft's speed, so it arrives at America using less time than the time needed when going back to Hong Kong.

However, when going back to Hong Kong, the aircraft encounters the huge jetstream again above Japan, but this time it is blowing directly opposite of its direction, forcing the aircraft to slow down and use more fuel, therefore, flights will take more time inbound and sometimes they even need to land at Japan or Taiwan to refuel for precautionary purposes.

自轉關係.太空船會順住地球繞一圈後才能飛出太空

2007-11-12 19:45:55 補充：
搭多兩次(向東/西方向)長途途機便知.越長途時間差別越大,尤其北美