AA 344 then AA 1225 at Miami
Guatemala City → Miami → Boston
Timetable, Miami time
09:46AA 344 from Guatemala City at the gate
09:13AA 1225 to Boston leaves the gate
23 h 27 apart on the timetable, overnight
AA 1225 leaves 23 h 27 after AA 344 arrives on the timetable: more than half a day, so not a connection we count.