Just a quick suborbital hop. The limiting factor in this is safe, reliable engines, whether jet, rocket, or a hybrid of the 2. It seems, however that commercial aerospace seems to be doing a superior job to goobermint operations.
CC
Suborbital is right. Forget interstellar. Too far to go, way to far. Light years away. Even if you could find a propulsion system before you got any appreciable distance to another star system everything and everybody you left on Earth will be long gone.
The reuse of a passenger rocket liner after a day or two for servicing will be crucial if such flights are to be routine and capable of supporting an airline business model. Space-X aims for a same day reuse capability for its Falcon boosters, so they seem on course to meet the technical challenge of reliable, reusable rocket engines. I am not so sure that it can be done at an affordable price and bearable g stress on the passengers. After all, those who can afford super pricey tickets tend to be in their fifties or sixties.
Hmmmmm... I wouldn't think that suborbital = "outer space", but this, at least, sounds somewhat plausible...