I am a poster with limited SkyTeam international experience. I had previously booked a DL flight into Paris CDG, arriving at 2pm from ATL. Due to unexpected business changes, I now need to go to Berlin. I found some same day, low priced Air France flights from CDG to TXL that I am considering.

Question 1- What is the minimum transfer time needed to go through immigration/customs at CDG and get to the gate for the TXL flight? I have two options: 3:40pm (1hr40min transfer or late that evening (~6 hr transfer), and would prefer the former if possible and practical.

Question 2- What issues should be expected buying two separate tickets in this fashion? If I bought both through Delta, would they be willing to check bags all the way through from ATL to TXL or not? (Doing carry-on only is a possibility if needed).

Thanks in advance!