Actually, if you're not a U.S. citizen you will need a passport because you would be leaving the designated 50 states as of January '07 to my recolection.
So if you're leaving
Georgia to fly to Hawaii, Alaska, Puerto Rico, U.S. Virgin Islands,,etc and all other U.S territories (Sans Hawaii and Alaska because they are states, you will need a passport as a foreigner. You're Florida ID will not fly with DHS when flying back.
But if flying from
Georgia to New York which is technically within the country, an ID is fine.
U.S. Citizens on the other hand can fly with their ID to these respectives states/territories.