Solve the following sql problem:
Which airport did Republic Airline fly the most from?

Schema:
SCHEMA:
- Table: Air Carriers
  - Column: Code
    - Samples: [19031, 19032, 19033, 19034, 19035]
  - Column: Description
    - Samples: [Mackey International Inc.: MAC, Munz Northern Airlines Inc.: XY, Cochise Airlines Inc.: COC, Golden Gate Airlines Inc.: GSA, Aeromech Inc.: RZZ]
- Table: Airports
  - Column: Code
    - Samples: [01A, 03A, 04A, 05A, 06A]
  - Column: Description
    - Samples: [Afognak Lake, AK: Afognak Lake Airport, Granite Mountain, AK: Bear Creek Mining Strip, Lik, AK: Lik Mining Camp, Little Squaw, AK: Little Squaw Airport, Kizhuyak, AK: Kizhuyak Bay]
- Table: Airlines
  - Column: FL_DATE
    - Samples: [2018/8/1, 2018/8/1, 2018/8/1, 2018/8/1, 2018/8/1]
  - Column: OP_CARRIER_AIRLINE_ID
    - Samples: [19805, 19805, 19805, 19805, 19805]
  - Column: TAIL_NUM
    - Samples: [N956AN, N973AN, N9006, N870NN, N9023N]
  - Column: OP_CARRIER_FL_NUM
    - Samples: [1587, 1588, 1590, 1591, 1593]
  - Column: ORIGIN_AIRPORT_ID
    - Samples: [12478, 14107, 11042, 14843, 10423]
  - Column: ORIGIN_AIRPORT_SEQ_ID
    - Samples: [1247805, 1410702, 1104205, 1484306, 1042302]
  - Column: ORIGIN_CITY_MARKET_ID
    - Samples: [31703, 30466, 30647, 34819, 30423]
  - Column: ORIGIN
    - Samples: [JFK, PHX, CLE, SJU, AUS]
  - Column: DEST_AIRPORT_ID
    - Samples: [14107, 11618, 11298, 11298, 13303]
  - Column: DEST_AIRPORT_SEQ_ID
    - Samples: [1410702, 1161802, 1129806, 1129806, 1330303]
  - Column: DEST_CITY_MARKET_ID
    - Samples: [30466, 31703, 30194, 30194, 32467]
  - Column: DEST
    - Samples: [PHX, EWR, DFW, DFW, MIA]
  - Column: CRS_DEP_TIME
    - Samples: [1640, 1512, 744, 900, 600]
  - Column: DEP_TIME
    - Samples: [1649, 1541, 741, 944, 556]
  - Column: DEP_DELAY
    - Samples: [9, 29, -3, 44, -4]
  - Column: DEP_DELAY_NEW
    - Samples: [9, 29, 0, 44, 0]
  - Column: ARR_TIME
    - Samples: [2006, 2350, 938, 1347, 951]
  - Column: ARR_DELAY
    - Samples: [44, 53, -2, 43, -2]
  - Column: ARR_DELAY_NEW
    - Samples: [44, 53, 0, 43, 0]
  - Column: CANCELLED
    - Samples: [0, 0, 0, 0, 0]
  - Column: CANCELLATION_CODE
    - Samples: [None, None, None, None, None]
  - Column: CRS_ELAPSED_TIME
    - Samples: [342, 285, 176, 304, 173]
  - Column: ACTUAL_ELAPSED_TIME
    - Samples: [377, 309, 177, 303, 175]
  - Column: CARRIER_DELAY
    - Samples: [9, 0, None, 43, None]
  - Column: WEATHER_DELAY
    - Samples: [0, 0, None, 0, None]
  - Column: NAS_DELAY
    - Samples: [35, 53, None, 0, None]
  - Column: SECURITY_DELAY
    - Samples: [0, 0, None, 0, None]
  - Column: LATE_AIRCRAFT_DELAY
    - Samples: [0, 0, None, 0, None]

SELECT T2.DEST FROM `Air Carriers` AS T1 INNER JOIN Airlines AS T2 ON T1.Code = T2.OP_CARRIER_AIRLINE_ID WHERE T1.Description = 'Republic Airline: YX' GROUP BY T2.DEST ORDER BY COUNT(T2.DEST) DESC LIMIT 1