Originally Posted by
etudiant
I'd read someplace that Concorde got precleared to land at JFK at departure, because there was so little extra endurance, allegedly less than half an hour on arrival in New York. Is that an urban myth?
Probably myth - the BA Concordes could reach Barbados, about an hour-longer flight (3:45 total). AF could reach Dakar (Africa) to refuel enroute Rio. So the tanks had plenty of reserve available.
Concorde may have had a more tightly scheduled "arrival window" for other special needs, though.