Passenger load factor, or load factor, measures the capacity utilization of public transport services like airlines, passenger railways, and intercity bus services.
It is generally used to assess how efficiently a transport provider fills seats and generates fare revenue.
According to the International Air Transport Association, the worldwide load factor for the passenger airline industry during 2015 was 79.7%.
[1] Passenger load factor is an important parameter for the assessment of the performance of any transport system.
[3] At a load factor lower than the break even level, the airline will lose money, and above will record a profit.
The environmental performance of any transport mode improves as the load factor increases.
Commenting in May 2017 on the United Express Flight 3411 incident, in which a passenger was forcibly removed, investor Warren Buffett said that passenger demand for cheap flights was resulting in high load factors, resulting in "a fair amount of discomfort.
"[4] Specifically, the load factor is the dimensionless ratio of passenger-kilometres travelled to seat-kilometres available.