If the flight has an empty leg – think air charter

In the air industry, an empty leg is a flight where the aircraft flies empty with no passengers or freight. So rather than lose money, the operators offer really cheap charter fares or air freight -- but you have to be quick.

Air China activates AHM system on Boeing 737 fleet

Air China has just installed Boeing's AMH or Aircraft Management System on its fleet of 737 airplanes, which monitors data from aircraft in flight and relays it to maintenance crews on the ground.