Delta Air Lines has been reported as having the highest passenger load factor (PLF) among major U.S. airlines, surpassing competitors American, United, and Alaska. This is largely attributed to its premium services and robust international operations network. As such, PLF serves as a crucial indicator of both operational and financial performance for commercial airlines, representing the average occupancy rate of aircrafts.
The system-wide passenger load factor for U.S. carriers, excluding all-cargo services, reached 83.03% in 2024, slightly surpassing the 82.92% recorded in 2023, based on data from the Bureau of Transportation Statistics (BTS). In comparison, global industry standards report a PLF of 83.5% for the same year, according to the International Air Transport Association.
Among major U.S. carriers, Delta Air Lines maintained an 85.0% PLF during 2024, placing it at the top of the list. "The popularity of routes experienced minor changes in 2024 because international travel started to recover from its decline," said a Delta spokesperson.