ONT, which has seen slight drop in passenger traffic for most of the year, finished the year with a 5.4 percent decline in traffic compared with 2011, according to figures released by Los Angeles World Airports on Monday.
A total of 4.3 million passengers traveled through ONT in 2012 which is a decline of 246,446 passengers from 2011.
There was a bit of positive news, air cargo finished the year on top with almost a 9 percent increase from 2011. A total of 454,800 tonnage of cargo was processed through the airport, up 8.9 percent from the previous year.
LAWA officials announced on Monday that Los Angeles International Airport, for the year, had 63.7 million passengers use the airport, a 3 percent increase from 2011.
LAX ended 2012 with a 5 percent increase in passenger traffic for the month of December compared with the same time frame in 2011.
The agency manages ONT, LAX and Van Nuys airports.