FR 8196 then UA 943 at Lisbon
Rome → Lisbon → Washington
Timetable, Lisbon time
13:00FR 8196 from Rome at the gate
12:20UA 943 to Washington leaves the gate
23 h 20 apart on the timetable, overnight
UA 943 leaves 23 h 20 after FR 8196 arrives on the timetable: more than half a day, so not a connection we count.