OS 7797 then AF 2382 at Newark
London → New York → Atlanta
Timetable, New York time
16:20OS 7797 from London at the gate
19:59AF 2382 to Atlanta leaves the gate
3 h 39 apart on the timetable
The last days
OS 7797 and AF 2382 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.