Paris: How much is a Second Class stamp? http://www.irondalecafe.com/history/ actos price The average flyer does not know of or use Sabre, but it is the system that is used by 300 airports and 100 airlines including American, Jet Blue, Frontier, Alaska, Virgin American, Qantas and others. In fact, it processes over 300 million passengers a year. And when the system goes down, an airline loses its reservation system in terms of tracking of reservations, passengers and flights.