AA 597 then AS 1400 at San Francisco
Chicago O'Hare → San Francisco → Las Vegas
Timetable, San Francisco time
16:19AA 597 from Chicago O'Hare at the gatealso QF 4712
17:59AS 1400 to Las Vegas leaves the gatealso QR 2966, DE 5013, FJ 5840, BA 6427, CX 7934
1 h 40 apart on the timetable
The last days
AA 597 and AS 1400 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.