The air carrier Turkish airlines announced recently that is going to increase the number of weekly flights between Oporto and Istambul from 5 to 7. This should happen after October 2019, more precisely after the 27th. There will also be flights every Monday and Wednesday departing from Oporto airport, between the 27th October 2019 and the 28th March 2020.
This is clearly good news for Oporto, as it is now one step closer to the capital of Turkey. Istambul!!