UA 3236 then UA 20 at Houston
Mc Allen → Houston → Amsterdam
Timetable, Houston time
20:10UA 3236 from Mc Allen at the gate
15:55UA 20 to Amsterdam leaves the gate
19 h 45 apart on the timetable, overnight
UA 20 leaves 19 h 45 after UA 3236 arrives on the timetable: more than half a day, so not a connection we count.