Last time..IF the ferry gets in at 12.30 (unlikely).IF you get thro C and I n in about 30 mins(unlikely).Then you get a cab to the airport with 15 mins(unlikely).They want you checking in three hours pre flight.you do the math and seems if you are comfortable with it..then go for it.I would not but that seems like its me..I would go early..breakfast at Emerald Beach and stroll to the airport. You do seem to be locked into your plan so go for it..