TK 1855 then FR 2507 at Barcelona
Istanbul → Barcelona → Cologne
Timetable, Barcelona time
17:15TK 1855 from Istanbul at the gate
14:10FR 2507 to Cologne leaves the gate
20 h 55 apart on the timetable, overnight
FR 2507 leaves 20 h 55 after TK 1855 arrives on the timetable: more than half a day, so not a connection we count.