Supersonic flights will be very much a premium fare option, due to the significant increase in energy use and fuel required for supersonic flight. Make a super

Supersonic flights will be very much a premium fare option, due to the significant increase in energy use and fuel required for supersonic flight. Make a supersonic aircraft too big and you risk not being able to find enough passengers willing to pay fares that make it viable - which is one of the issues that killed Concorde.