OS 335 then BA 267 at Heathrow
Vienna → London → Portland (Oregon)
Timetable, London time
14:05OS 335 from Vienna at the gate
13:35BA 267 to Portland (Oregon) leaves the gate
23 h 30 apart on the timetable, overnight
BA 267 leaves 23 h 30 after OS 335 arrives on the timetable: more than half a day, so not a connection we count.