UA 2135 then UA 3234 at Houston
Seattle → Houston → Silao
Timetable, Houston time
13:21UA 2135 from Seattle at the gate
09:15UA 3234 to Silao leaves the gate
19 h 54 apart on the timetable, overnight
UA 3234 leaves 19 h 54 after UA 2135 arrives on the timetable: more than half a day, so not a connection we count.