CV 251 then UA 5813 at O'Hare
Anchorage → Chicago → Lexington
Timetable, Chicago time
19:00CV 251 from Anchorage at the gate
07:40UA 5813 to Lexington leaves the gate
12 h 40 apart on the timetable, overnight
UA 5813 leaves 12 h 40 after CV 251 arrives on the timetable: more than half a day, so not a connection we count.