I will be going to Vienna via Istanbul [Turkish airlines] and I have 2 layover options. The first option is a 1-hour 40-minute layover and the second is a 6-hour layover.
I am keen on choosing the first option, but I am concerned about flight delays. If I choose the second option then I will be spending 6 hours in the airport.
I have 2 questions:
Is a 1-hour 40-minute gap between flights good enough?
Will I be allowed to enter Istanbul as I will have a valid Schengen visa?