UA 992 then FR 2507 at Barcelona
Washington → Barcelona → Cologne
Timetable, Barcelona time
09:00UA 992 from Washington at the gatealso AC 3802, LH 7946
06:20FR 2507 to Cologne leaves the gate
21 h 20 apart on the timetable, overnight
FR 2507 leaves 21 h 20 after UA 992 arrives on the timetable: more than half a day, so not a connection we count.