坐飛機速度每小時大約幾多公里？（急）

巡航既時候，一般９００至９８０公里左右，再快ｄ得唔得？當然可以！過千都得，不過以飛機黎講，快得過幾十公里作用根本唔大，最多都係早到十分八分鐘，反而有時早到達目的地既時候，當地機場無預你甘早到而需要係天空盤旋，等候降落。相反有時因為預知當地機場繁忙，所以慢慢飛，大約８００公里左右！起飛同降落速度方面，要視乎跑道長短及飛機重量，一般中型客機大約２５０公里已經夠起飛，大型客機就大約２８０公里都可以起飛，不過都係個句：要視乎跑道長短及飛機重量！臨落地既速度，一般１８０公里左右，太快會對飛機既減速系統有過大損耗，甚至唔夠停！太慢就會失速繼而起掉落地！

350~450 knots which means about 850~1000 km/h It depends on the tailwind or headwind. IF there is not wind is about 900km/h

約900Km/Hour.

"This Boeing 747, commonly called a jumbo jet, makes a cargo-transport flight. The 747, the first of the wide-bodied commercial jets, had its inaugural flight in 1970. Four jet engines propel the plane, which reaches cruising speeds of 885 km/hr (550 mph)."

"747 Jumbo Jet." Microsoft Encarta Encyclopedia. CD-ROM, 2000

最高950-1000km/hr