I have a connecting flight soon with Airberlin at TXL. I should be arriving in terminal C and my next flight is in terminal A, i have exactly 1 hour, no customs or anything but i have looked everywhere about connecting there and all i can find is that every gate has its own security. My question is, how long of a walk is it from C to A and is there signs? Will I have to go outside or is there a hallway that connects the 2 buildings. How long does security take at the gates? anyways thanks for the help!