AA 1494 then UA 5201 at O'Hare
San Diego → Chicago → Milwaukee
Timetable, Chicago time
04:49AA 1494 from San Diego at the gate
20:00UA 5201 to Milwaukee leaves the gate
15 h 11 apart on the timetable
UA 5201 leaves 15 h 11 after AA 1494 arrives on the timetable: more than half a day, so not a connection we count.