OO 9909 then UA 2164 at O'Hare
Waterloo → Chicago → Phoenix
Timetable, Chicago time
16:47OO 9909 from Waterloo at the gate
11:08UA 2164 to Phoenix leaves the gate
18 h 21 apart on the timetable, overnight
UA 2164 leaves 18 h 21 after OO 9909 arrives on the timetable: more than half a day, so not a connection we count.