UA 3237 then DL 2403 at Houston
Louisville → Houston → Atlanta
Timetable, Houston time
12:15UA 3237 from Louisville at the gate
18:19DL 2403 to Atlanta leaves the gate
6 h 04 apart on the timetable
The last days
UA 3237 and DL 2403 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.