At American's terminal, it should be very quiet at that time of morning...They have a 777 arriving from GRU
and a 767 from EZR both at 6AM and that should be about it.
Eagle arrives at the brand new terminal 9, midfield concourse. Most of AA
's Miami flights now leave from Terminal 9...But some do from Terminal 8 as well.
So if you do have to walk over to T8
, it is not bad at all..I'm pretty sure the area is covered and not more than 5 minutes.
Most likely though, your flight to MIA
will leave from the same concourse where your Eagle flight arrived from.
But chances are you will have enough time to take a trip around JFK
on the AirTrain if you want.
"Millions long for immortality who do not know what to do with themselves on a rainy Sunday afternoon"