The April 1957 Official Airline Guide shows 316 weekday departures : 95 Eastern ( plus six a week to\/from South America ) , 77 American , 61 Capital , 23 National , 17 TWA , 10 United , 10 Delta , 6 Allegheny , 6 Braniff , 5 Piedmont , 3 Northeast and 3 Northwest .
The April 1957 Official Airline Guide shows that the airport had 316 weekday departures .