Wildcard searches using AirlineFlightSchedules

Using the FlightXML 3 API I am looking for a way to do wildcard searched for destination or origin in AirlineFlightSchedules.
In particular, I am looking for a way to find all the scheduled flights for a given airline going to a given area, main North America. I figure if I could use the ICAO prefix like “K***” that should work, but how can I do that? There is mention of wildcards in the documentation.

Does anyone have thoughts on how to do this?

Wildcard searches are not permitted in AirlineFlightSchedules. An individual query per airport would need to be made if looking for all scheduled flights to a set of destinations.