KL 661 then UA 3917 at Houston
Amsterdam → Houston → Austin
Timetable, Houston time
13:05KL 661 from Amsterdam at the gate
07:30UA 3917 to Austin leaves the gate
18 h 25 apart on the timetable, overnight
UA 3917 leaves 18 h 25 after KL 661 arrives on the timetable: more than half a day, so not a connection we count.