UA 1307 then AA 9973 at Atlanta
Newark → Atlanta → Washington National
Timetable, Atlanta time
15:28UA 1307 from Newark at the gate
17:16AA 9973 to Washington National leaves the gate
1 h 48 apart on the timetable
The last days
UA 1307 and AA 9973 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.