Flight Istanbul Atatürk Airport departs from Istanbul Istanbul Atatürk Airport at 12:45 and arrives at Porto Francisco Sá Carneiro Airport at 15:40.
The flighttime is about 4h 55m. The distance travelled ("as the bird flies"): 4169 Km. So the average speed is roughly 848 Km.
There is an 2 hour time difference between Istanbul and Porto
