BA 293 then UA 6234 at Dulles
London → Washington → Syracuse
Timetable, Washington time
19:55BA 293 from London at the gate
12:45UA 6234 to Syracuse leaves the gate
16 h 50 apart on the timetable, overnight
UA 6234 leaves 16 h 50 after BA 293 arrives on the timetable: more than half a day, so not a connection we count.