We do not have enough data on this route to provide a reliable graph showing how many days before departure it is the best to book.
However, usually the closer it is to the departure, the more expensive the tickets are.
There is no direct flight on the route from New York John F. Kennedy to San Antonio Intl Airport
Il volo con scalo più breve dura 6h 54min.
New York (NY) San Antonio (TX)