BA 297 then ET 3511 at O'Hare
London → Chicago → Muscat
Timetable, Chicago time
18:45BA 297 from London at the gate
09:05ET 3511 to Muscat leaves the gate
14 h 20 apart on the timetable, overnight
ET 3511 leaves 14 h 20 after BA 297 arrives on the timetable: more than half a day, so not a connection we count.