UA 804 then UA 3752 at Dulles
Tokyo → Washington → Oklahoma City
Timetable, Washington time
15:40UA 804 from Tokyo at the gate
09:40UA 3752 to Oklahoma City leaves the gate
18 h apart on the timetable, overnight
UA 3752 leaves 18 h after UA 804 arrives on the timetable: more than half a day, so not a connection we count.