UA 1237 then QR 8806 at O'Hare
Minneapolis → Chicago → Houston
Timetable, Chicago time
20:21UA 1237 from Minneapolis at the gate
02:20QR 8806 to Houston leaves the gate
5 h 59 apart on the timetable, overnight
The last days
UA 1237 and QR 8806 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.