After seeing recent successes with the SN5 prototype, powered with very inexpensive LNG, designed to carry 100+ people, is this ... an airliner?
A suborbital Starship could make trans Atlantic and Pacific flights in a matter of minutes.
Suborbital flights require far less energy than orbital (or extra orbital), and would reach their destinations more than 10x faster than subsonic airliners.
Earth routes tend to have more volume than lunar or Martian ones.
Is this application a viable possibility, based on travel time (turnaround), ticket price, and fuel cost?