Best Data Source For Total Scheduled Departures Per Airport Per Day?

I’m building a forecasting model that needs a simple input: the number of scheduled departures from a given U.S. airport for the current day (only domestic is fine).

I’ve been using AeroDataBox and running into limitations:

• Their FIDS/departures endpoint caps results at ~295 flights per call. A busy airport like ATL or JFK easily has 500-800+ departures/day, so I need multiple calls with different time windows just to cover one airport for one day. It works but it’s expensive and slow at scale.
• Their “Airport Daily Routes” endpoint only returns a 7-day trailing average of flights per route — not the actual scheduled count for a specific day.

BTS On-Time Performance data is great for historical domestic flights but it lags by several months so it’s useless for current/future dates.

All I really need is a single number per airport per day — total scheduled departures. I don’t need individual flight details, passenger manifests, or real-time status. Just the count.

Is there an API or dataset that can give me this without having to paginate through hundreds of individual flight records?

Thanks in advance.