35 minutes seems to be the current MCT at CLT for a domestic to international connection. There are multiple AA domestic-to-Caribbean routes with this timing, A connection time warning appears when you bring up these tight routings on the web. The warning seems to drop off once the connection time exceeds an hour. So perhaps the summary here is: MCT - 35 min; RCT - 65 min; SCT (Safe Connection Time) - 90 min.