Yes that's right, they should have landed somewhere in 1939, perhaps not Idlewild Airport (JFK), but somewhere, find a way to steal some gas...A LOT of gas for that jetliner and then take another shot at the time travel with the supernatural jet stream that time jumps them. Why risk being thrown backwards in time again and continue being low on fuel? And worst comes to worst, 1939 is a better alternative to people from 1960 then prehistoric times. It would have been great to have a sequel episode to this in one of the modern Twilight Zone revamps, with Flight 33 being confused as to why Idlewild airport is now called John F. Kennedy airport.