OO 9909 then UA 3702 at O'Hare
Waterloo → Chicago → Indianapolis
Timetable, Chicago time
16:47OO 9909 from Waterloo at the gate
12:45UA 3702 to Indianapolis leaves the gate
19 h 58 apart on the timetable, overnight
UA 3702 leaves 19 h 58 after OO 9909 arrives on the timetable: more than half a day, so not a connection we count.