UA 3880 then M6 2773 at Houston
IAB → Houston → Louisville
Timetable, Houston time
03:26UA 3880 from IAB at the gate
08:30M6 2773 to Louisville leaves the gate
5 h 04 apart on the timetable
The last days
UA 3880 and M6 2773 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.