UA 1012 then WN 986 at Atlanta
Newark → Atlanta → Phoenix
Timetable, Atlanta time
08:33UA 1012 from Newark at the gate
12:50WN 986 to Phoenix leaves the gate
4 h 17 apart on the timetable
The last days
UA 1012 and WN 986 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.