UA 4456 then UA 311 at Houston
Baton Rouge → Houston → Philadelphia
Timetable, Houston time
06:21UA 4456 from Baton Rouge at the gate
18:36UA 311 to Philadelphia leaves the gate
12 h 15 apart on the timetable
UA 311 leaves 12 h 15 after UA 4456 arrives on the timetable: more than half a day, so not a connection we count.