UA 451 then DL 2112 at San Francisco
New Orleans → San Francisco → New York JFK
Timetable, San Francisco time
15:26UA 451 from New Orleans at the gate
21:35DL 2112 to New York JFK leaves the gatealso AM 4443, VS 4856, KQ 7007
6 h 09 apart on the timetable
The last days
UA 451 and DL 2112 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.