Which flight carrier operator flies from Atlantic City to Fort Lauderdale?
flight carrier operator refers to OP_CARRIER_AIRLINE_ID; from Atlantic City refers to ORIGIN = 'ACY'; to Fort Lauderdale refers to DEST = 'FLL';
SELECT T2.Description FROM Airlines AS T1 INNER JOIN `Air Carriers` AS T2 ON T1.OP_CARRIER_AIRLINE_ID = T2.Code WHERE T1.ORIGIN = 'ACY' AND T1.DEST = 'FLL' GROUP BY T2.Description