AA 1854 then UA 5201 at O'Hare
San Francisco → Chicago → Milwaukee
Timetable, Chicago time
05:59AA 1854 from San Francisco at the gate
20:00UA 5201 to Milwaukee leaves the gate
14 h 01 apart on the timetable
UA 5201 leaves 14 h 01 after AA 1854 arrives on the timetable: more than half a day, so not a connection we count.