KL 651 then UA 3752 at Dulles
Amsterdam → Washington → Oklahoma City
Timetable, Washington time
15:55KL 651 from Amsterdam at the gate
09:40UA 3752 to Oklahoma City leaves the gate
17 h 45 apart on the timetable, overnight
UA 3752 leaves 17 h 45 after KL 651 arrives on the timetable: more than half a day, so not a connection we count.