AS 227 then AA 948 at San Francisco
New York JFK → San Francisco → Chicago O'Hare
Timetable, San Francisco time
13:04AS 227 from New York JFK at the gate
14:32AA 948 to Chicago O'Hare leaves the gate
1 h 28 apart on the timetable
The last days
AS 227 and AA 948 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.