BA 195 then UA 3917 at Houston
London → Houston → Austin
Timetable, Houston time
14:05BA 195 from London at the gate
07:30UA 3917 to Austin leaves the gate
17 h 25 apart on the timetable, overnight
UA 3917 leaves 17 h 25 after BA 195 arrives on the timetable: more than half a day, so not a connection we count.