UA 1597 then CV 21 at O'Hare
Salt Lake City → Chicago → Luxembourg
Timetable, Chicago time
20:43UA 1597 from Salt Lake City at the gate
01:15CV 21 to Luxembourg leaves the gate
4 h 32 apart on the timetable, overnight
The last days
UA 1597 and CV 21 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.