Currently is looks like this it will 1st be a domestic flight (b6 or do, so terminal 5 or 2/4) followed by international sn Brussels flight (terminal 1). Haven't made the listing yet, but I presume it will go into 1 reservation. In that case no need for picking up any checked baggage I guess since that should be labeled through? Anyways, we will need to take the airtrain to the terminal 1. Take 20 minutes from gate to airtrain, another 20 to get to terminal 1, 30 minutes to go through carry-on control, so 1,5 hours would be absolute minimum. Of course, if it a separate reservation, then we'll need to take the earliest flight out of MCO just to be a bit relaxed at jfk (then again, leaving resort at 5 a.m. is not something I look forward with the transatlantic flight leaving at 6pm)