{
    "callsign": "FRG1641",
    "number": "1641",
    "airline_code": "FRG",
    "airport_codes": "KGRB-KMKE",
    "_airport_codes_iata": "GRB-MKE",
    "_airports": [
        {
            "name": "Austin Straubel International Airport",
            "icao": "KGRB",
            "iata": "GRB",
            "location": "Green Bay",
            "countryiso2": "US",
            "lat": 44.4851,
            "lon": -88.129601,
            "alt_feet": 695.0,
            "alt_meters": 211.84
        },
        {
            "name": "General Mitchell International Airport",
            "icao": "KMKE",
            "iata": "MKE",
            "location": "Milwaukee",
            "countryiso2": "US",
            "lat": 42.947201,
            "lon": -87.896599,
            "alt_feet": 723.0,
            "alt_meters": 220.37
        }
    ]
}