Originally Posted by
Builderman
IAD-IST via CDG is non-Schengen to non-Schengen and should be a T-2E to T-2E connection. IIRC the MCT for intra-T-2E is 90 minutes.
If you are on one ticket, this is doable.
I am still worried about your IST-CDG-IST ticket. only do this if you have significant(!!!!) time between your flights.