BA 184 then BA 870 at Heathrow
Newark → London → Budapest
Timetable, London time
06:30BA 184 from Newark at the gate
19:45BA 870 to Budapest leaves the gate
13 h 15 apart on the timetable
BA 870 leaves 13 h 15 after BA 184 arrives on the timetable: more than half a day, so not a connection we count.