AA 2636 then UA 3376 at O'Hare
San Jose del Cabo → Chicago → St Louis
Timetable, Chicago time
19:15AA 2636 from San Jose del Cabo at the gate
11:00UA 3376 to St Louis leaves the gate
15 h 45 apart on the timetable, overnight
UA 3376 leaves 15 h 45 after AA 2636 arrives on the timetable: more than half a day, so not a connection we count.