Space-A air opportunities change daily and, in fact, even hourly. There are more than 200 active locations at which uniformed personnel, their eligible family members, and others may fly Space-A. There are also many other less active locations which offer some Space-A air opportunities. We estimate that more than 800,000 Space-A flights (all services) are taken every year. Availability is subject to time of the year, air mission, needs of the military services, quantity of flights, frequency of flights and the number of people attempting to fly Space-A. This large number of interactive variables which impact Space-A Air Opportunities makes it very difficult to precisely predict the availability of Space-A seats to a particular destination at a precise time.