AA 2258 then BR 641 at O'Hare
Las Vegas → Chicago → Taipei
Timetable, Chicago time
12:52AA 2258 from Las Vegas at the gate
12:40BR 641 to Taipei leaves the gate
23 h 48 apart on the timetable, overnight
BR 641 leaves 23 h 48 after AA 2258 arrives on the timetable: more than half a day, so not a connection we count.