The City of San Antonio head Start and Early Head Start-CCP sites are located in the Edgewood ISD and San Antonio ISD.
A few airlines go beyond this basic requirement to include a provision that if your onward connecting flight from a hub airport is canceled on an outbound trip, and you no longer want to continue the trip, the airline will return you to your original airport at no charge and refund the entire value of the ticket.
If you want to cancel on line, you need to do so at least one hour before the scheduled departure of the flight. This is simply the way their reservation system is set up (you also have to check in on line at least one hour before flight time) - it has nothing to do with retaining the value of the ticket. In almost all instances, when you cancel on line your ticketless funds are available for reuse immediately.