Lufthansa then operated Boeing 720B jets on this same routing in 1963 .
Lufthansa then was also flying Boeing 707 service to Frankfurt via stops in Montreal and London Heathrow Airport the same year .
Lufthansa then operated Boeing 720B jets on this same routing in 1963 and was also flying Boeing 707 service to Frankfurt via stops in Montreal and London Heathrow Airport the same year .