FR 7873 then IB 811 at Madrid
Palermo → Madrid → Prague
Timetable, Madrid time
12:55FR 7873 from Palermo at the gate
16:10IB 811 to Prague leaves the gatealso AT 5325, LA 5435, VY 5449, AA 8564
3 h 15 apart on the timetable
The last days
FR 7873 and IB 811 weren’t both flown 15 min to 12 h apart in the last 21 days.
Statistics from past flights, not live flight information. Always check times and your connection with your airline, and don’t base travel or booking decisions on these numbers.