WN 3471 then KL 6537 at San Francisco
Phoenix → San Francisco → Atlanta
Timetable, San Francisco time
09:50WN 3471 from Phoenix at the gate
14:05KL 6537 to Atlanta leaves the gate
4 h 15 apart on the timetable
The last days
WN 3471 and KL 6537 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.