EC 1703 then IB 811 at Madrid
Nice → Madrid → Prague
Timetable, Madrid time
12:25EC 1703 from Nice at the gate
16:00IB 811 to Prague leaves the gatealso AT 5325, LA 5435, VY 5449, AA 8564
3 h 35 apart on the timetable
The last days
EC 1703 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.