UA 992 then VY 1208 at Barcelona
Washington → Barcelona → Stuttgart
Timetable, Barcelona time
09:00UA 992 from Washington at the gatealso AC 3802, LH 7946
06:30VY 1208 to Stuttgart leaves the gatealso IB 5394, LL 5394
21 h 30 apart on the timetable, overnight
VY 1208 leaves 21 h 30 after UA 992 arrives on the timetable: more than half a day, so not a connection we count.