IST - can checkin for flight airside?
I have two flights on TK connecting in IST. It's booked as two separate tickets and both are international. Is it possible to not go through immigration and check in for my second flight airside in IST? Is there a "transfer" section? This is assuming i'm traveling with carryon only. If I have to go through immigration, how long of a line can I expect as US citizen arriving 6am sunday morning?
I have 3 hours for this connection and trying to see if it's doable or too tight. I can't book it as one ticket, unfortunately.