> It worked NY/London but at ~$20k/seat they couldn't fill enough seats several times daily on other routes.
Your price is way off.
http://www.airliners.net/aviation-forums/general_aviation/re...
Your price is way off.
http://www.airliners.net/aviation-forums/general_aviation/re...
That's about $16k when accounting for inflation, so $20k isn't too far off.
Given the existence of business class only BA NY to City of London flights, there probably is a market for expensive supersonic routes, but it's probably still pretty small. International lawyers may value the back and forth in a day, but most people who fly business/first are probably fine with comfortable seating and a nice meal even if it takes a bit longer.