UA 2250 then UA 3755 at Houston
Dallas-Fort Worth → Houston → Lubbock
Timetable, Houston time
06:25UA 2250 from Dallas-Fort Worth at the gate
22:10UA 3755 to Lubbock leaves the gate
15 h 45 apart on the timetable
UA 3755 leaves 15 h 45 after UA 2250 arrives on the timetable: more than half a day, so not a connection we count.