Don't forget that Richard Branson offered to keep Concorde flying under the Virgin colors, but this was too much for BA to stomach.
Didn't Sukhoi have a project for a supersonic business jet?
Concorde flew briefly into Miami as well. I don't know how long it took them, but LHR-MIA is something like 10 hours subsonic. They also flew to someplace in the Caribbean regularly.
Used to fly to Barbados from Heathrow, which is why I had my honeymoon there. When we booked it's retirement hadn't been announced if I wasn't already travelling by Concorde I would done the LHR-JFK Concorde with QEII back round trip.
I think flight time was around 4 hours, looking at the other folks arriving in reception hours after us all looking shattered after a 9ish hour flight was a great experience.
Would do it again tomorrow if I could worth every penny.