FB 437 then DE 2118 at Frankfurt
Sofia → Frankfurt am Main → Cancún
Timetable, Frankfurt am Main time
13:15FB 437 from Sofia at the gate
12:45DE 2118 to Cancún leaves the gate
23 h 30 apart on the timetable, overnight
DE 2118 leaves 23 h 30 after FB 437 arrives on the timetable: more than half a day, so not a connection we count.