We're not kidding...
The plane, which has been proposed and is a concept for the time being, will travel 20 times faster than the speed of sound and is powered by a hydrogen-oxygen mix.
The aircraft reaches the edge of the upper atmosphere and then glide towards it's destination at 4.3 miles a second. We've done some maths and that's about 15,480 miles an hour. Yep.
The Spaceliner should exist a bit more solidly in 2030 - if they can find $33 billion to build it. Not sure where they'll find that though. Most expensive crowdfund ever? Probably. Probably.