A passenger aircraft that flies around the world at Mach 9?
Spacex also has plans for hypersonic flight through space. A rocket goes up and then goes horizontal and then lands at destination. Price point is close to business class on a 20 hour flight.<p>How much do things change? Flights halfway around the world won&#x27;t be exhausting anymore.  And to be rational, there should ONLY be flights that go ONLY halfway around the world.  Otherwise, it is more economically disruptive and less resource  friendly.<p>So that means, Beijing--New York, London--San Francisco, Dubai--Hawaii, South Africa --Tokyo, etc.