TK 1933 then UA 928 at Heathrow
Istanbul → London → Chicago
Timetable, London time
14:45TK 1933 from Istanbul at the gate
13:35UA 928 to Chicago leaves the gate
22 h 50 apart on the timetable, overnight
UA 928 leaves 22 h 50 after TK 1933 arrives on the timetable: more than half a day, so not a connection we count.