DL 112 then FR 6926 at Fiumicino
Boston → Rome → Barcelona
Timetable, Rome time
08:45DL 112 from Boston at the gate
05:55FR 6926 to Barcelona leaves the gate
21 h 10 apart on the timetable, overnight
FR 6926 leaves 21 h 10 after DL 112 arrives on the timetable: more than half a day, so not a connection we count.