UA 5104 then BA 195 at Houston
Hattiesburg → Houston → London
Timetable, Houston time
12:35UA 5104 from Hattiesburg at the gate
15:50BA 195 to London leaves the gate
3 h 15 apart on the timetable
The last days
UA 5104 and BA 195 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.