AZ 619 then W4 6017 at Fiumicino
Washington → Rome → Barcelona
Timetable, Rome time
07:00AZ 619 from Washington at the gate
06:55W4 6017 to Barcelona leaves the gate
23 h 55 apart on the timetable, overnight
W4 6017 leaves 23 h 55 after AZ 619 arrives on the timetable: more than half a day, so not a connection we count.