UA 3773 then AA 1353 at San Francisco
Los Angeles → San Francisco → Chicago O'Hare
Timetable, San Francisco time
22:40UA 3773 from Los Angeles at the gate
07:13AA 1353 to Chicago O'Hare leaves the gatealso IB 4078, QF 4693, EI 7102
8 h 33 apart on the timetable, overnight
The last days
UA 3773 and AA 1353 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.