UX 16 then IB 1085 at Madrid
La Mesa → Madrid → Valencia
Timetable, Madrid time
05:00UX 16 from La Mesa at the gate
23:40IB 1085 to Valencia leaves the gatealso CX 1909
18 h 40 apart on the timetable
IB 1085 leaves 18 h 40 after UX 16 arrives on the timetable: more than half a day, so not a connection we count.