AF 2152 then UA 8205 at San Francisco
New York JFK → San Francisco → Newark
Timetable, San Francisco time
01:15AF 2152 from New York JFK at the gate
10:05UA 8205 to Newark leaves the gate
8 h 50 apart on the timetable
The last days
AF 2152 and UA 8205 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.