TP 239 then SQ 1491 at San Francisco
Lisbon → San Francisco → New York JFK
Timetable, San Francisco time
14:45TP 239 from Lisbon at the gatealso EY 2796, B6 6734
22:56SQ 1491 to New York JFK leaves the gate
8 h 11 apart on the timetable
The last days
TP 239 and SQ 1491 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.