J1 4873 then B9 9705 at Istanbul
GBT → Istanbul → Tehran
Timetable, Istanbul time
10:30J1 4873 from GBT at the gate
15:00B9 9705 to Tehran leaves the gate
4 h 30 apart on the timetable
Istanbul’s board shows about 81% of departures at their timetable time, so delays of a few minutes don’t show here.
The last days
J1 4873 and B9 9705 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.