While driving in the vicinity of PHL in 1970, I saw an Air France billboard advertising jet service to Paris - although their PHL-ORY (before CDG was opened!) flight was almost certainly operated with 707 equipment at the time, the aircraft pictured on the billboard was a Caravelle!
And before British Airways came into being, BOAC flew PHL-LHR. During a trip through PHL in 1972 I stopped at the BOAC counter to pick up a timetable. The English gentleman (easily identified by his accent) behind the counter let me know why I should choose BOAC on my PHL-LHR flight: their VC-10s used on the service had rear-mounted engines and, thus, a quieter cabin!