UA 2767 then UA 3755 at Houston
Seattle → Houston → Lubbock
Timetable, Houston time
06:13UA 2767 from Seattle at the gate
22:10UA 3755 to Lubbock leaves the gate
15 h 57 apart on the timetable
UA 3755 leaves 15 h 57 after UA 2767 arrives on the timetable: more than half a day, so not a connection we count.