# Why would it take so long (22 minutes!) to travel from Hong Kong to Singapore flying SpaceX?

In the SpaceX video Starship | Earth to Earth they show the flight time from Hong Kong to Singapore to be 22 minutes.

What's taking so long? It's only 4 hours by airplane (and US \$275!)

• Man does not like large accelerations. From this he can die. If you launch a nuclear warhead, it will be faster. – A. Rumlin Dec 19 '20 at 11:34
• An LEO ground track of 2500 km takes roughly 6 minutes to pass over. Any ballistic trajectory over Earth that connects two points 2500 km apart will take longer than that to fly, and on top of that, Starship will have to deal with atmosphere on the way up and down. – notovny Dec 19 '20 at 13:27
• We can easily say that the times given are consistent: i.stack.imgur.com/yIlO0.png It seems there are two different flight profiles for short and long distance travel though. 0km distance takes about 17 minutes and half-way around Earth takes 57 minutes. – asdfex Dec 19 '20 at 18:10
• The average speed would be ~2000 m/s, nearly mach 6; the acceleration phase would eat up about 3 minutes. Given how long it takes to get to your local aerospaceport and get through the security line, Amdahl's law makes it fairly pointless to go any faster. – Russell Borogove Dec 19 '20 at 22:57
• @uhoh, Not from my side. The time-of-flight calculation for these trajectories is too ugly. – asdfex Dec 21 '20 at 8:50