
8 hours
It was economically unviable and by now, woefully technologically outdated.
As a climate-conscious person, the concorde can stay exactly where it is and never move again thank you. That thing burned several times as much kerosene as a standard plane for the same journey with less cargo space, etc


That’s a lot of ifs.
And for what it’s worth, the concorde had afterburner-free cruising. It needed them for takeoff only.
And keep in mind that fuel prices are much higher now than in the 90-00s.