For a stunt in the Live Aid concert of 1985 (charity concert held simultaneously in UK and US, with a few other venues), Phil Collins performed in both London and Philadelphia during the same concert by flying across the pond on the Concord.
My question ... did he take a regularly-scheduled Concorde flight or was it chartered?
The question comes down to: What the BA Concorde schedule in July, 1985?
1) His performance at Wembley Stadium was done by 1450Z (3:50pm British Summer time in London).
2) He was playing drums in Philly by 2339Z (7:39pm EDT Philly time).
Assume that he took a helicopter from Wembley to LHR and from JFK to Philadelphia.
9 hours seems like plenty of time to do it. An article even mentions: "on the flight, Phil bumped into Cher, who didn't know anything about the transatlantic events." That definately suggests that it was the scheduled flavor of flight.
For a bit more about the events, check out: http://en.wikipedia.org/wiki/Liveaid
And ... as a challenge to the event's altruism, who paid for the $20k flight?