UA 951 then UA 3752 at Dulles
Brussels → Washington → Oklahoma City
Timetable, Washington time
14:30UA 951 from Brussels at the gate
09:40UA 3752 to Oklahoma City leaves the gate
19 h 10 apart on the timetable, overnight
UA 3752 leaves 19 h 10 after UA 951 arrives on the timetable: more than half a day, so not a connection we count.