UA 1248 then TK 6039 at O'Hare
San Francisco → Chicago → Quito
Timetable, Chicago time
11:24UA 1248 from San Francisco at the gate
10:50TK 6039 to Quito leaves the gate
23 h 26 apart on the timetable, overnight
TK 6039 leaves 23 h 26 after UA 1248 arrives on the timetable: more than half a day, so not a connection we count.