There ar every few day flights from the US to Europe. A lunchtime flight arriving at 8pm is far nicer than 5 hours sleep on an overnight flight or the 7am flight.
West bound being able to leave the office at 6pm and be in New York to pay the kids to bed is great.
I'm not sure the people who pay full-boat fares for business and first today is a sufficient market for a new supersonic plane and a viable set of airline routes (within the range of the plane which probably doesn't include trans-Pacific).
West bound being able to leave the office at 6pm and be in New York to pay the kids to bed is great.