AA 4504 then UA 2099 at O'Hare
South Bend → Chicago → Seattle (SEA)
Timetable, Chicago time
18:35AA 4504 from South Bend at the gate
09:25UA 2099 to Seattle (SEA) leaves the gate
14 h 50 apart on the timetable, overnight
UA 2099 leaves 14 h 50 after AA 4504 arrives on the timetable: more than half a day, so not a connection we count.