RJ 263 then BR 643 at O'Hare
Amman → Chicago → Anchorage
Timetable, Chicago time
15:05RJ 263 from Amman at the gate
11:55BR 643 to Anchorage leaves the gate
20 h 50 apart on the timetable, overnight
BR 643 leaves 20 h 50 after RJ 263 arrives on the timetable: more than half a day, so not a connection we count.