UA 451 then AF 8 at Boston
Houston → Boston → New York JFK
Timetable, Boston time
19:10UA 451 from Houston at the gate
20:15AF 8 to New York JFK leaves the gate
1 h 05 apart on the timetable
The last days
UA 451 and AF 8 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.