AA 2120 then IB 4975 at San Francisco
Dallas-Fort Worth → San Francisco → New York JFK
Timetable, San Francisco time
08:56AA 2120 from Dallas-Fort Worth at the gatealso IB 8018
12:08IB 4975 to New York JFK leaves the gate
3 h 12 apart on the timetable
The last days
AA 2120 and IB 4975 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.