And all signs indicate traffic figures this holiday season also will be up.
Earlier last week, just days before Christmas, dozens of empty truck trailers sat still in a vacant area on the northwest portion of the airport.
This marks the third year ONT has had a deal with UPS to rent space, said Jess Romo, airport manager.
"Their business picks up so much it makes sense to lease on short term basis," he said.
The extra trailers, some marked with the UPS logo, have been there since late November. More than a 100 trailers initially filled two parking lots.
"As UPS's West Coast regional air hub, Ontario sees increased flight and feeder truck activity this time of year," said Mike Mangeot, spokesman for UPS. "We add flights, hire seasonal package handlers and truck drivers, and work with contract carriers to carry extra package volume all over the U.S., and that's certainly true in the population centers of Southern California served by Ontario."
Nationally, UPS expects to deliver 527 million packages this peak season. If that number comes to fruition in the face of Hurricane Sandy on the East Coast and last week's Midwest blizzard, it will set a record with a 10 percent increase over 2011.
On Thursday, UPS delivered 28 million packages. That's about 300 every second, he said.
"These big numbers are driven to a great extent by e-commerce. Fully a third of all holiday shoppers did their buying online this year, with shopping via smartphone doubling since last year," Mangeot said.
UPS does business with 24 of the top 25 e-tailers, he said.
"Those companies are very smart about their logistics networks and often establish distribution facilities near UPS hubs to minimize time in transit for their customers," he said.
Traffic by the year
In the first half of the year, ONT air cargo traffic was up by about 15 percent.
Through October, those figures had dropped slightly, but reflected a 10 percent increase over the same period of 2011.
The airport could still be poised for more growth as long as the industrial sector continues to grow.
DAUM's third quarter market report states the demand for industrial space will continue to be driven by domestic and global consumption.
In the Inland Empire, industrial warehouse vacancies increased from 6.6 percent to 7.4 percent in the third quarter.
Online retailers prefer to deliver to the Inland Empire region through Ontario rather than shipping to Orange County or to Los Angeles International Airport because it gets to the customer more quickly, officials said.
Romo said FedEx and UPS are doing well in terms of traffic, Romo said.
"We have seen increases in their activity in the last two years," he said referring to FedEx. "Overall, we have seen increases in cargo."
In the last couple of months, FedEx has been working with LAWA real estate officials regarding its location at ONT.
"They are trying to reconfigure so they can bring in more wide-body aircraft," Romo said.
The carrier does not have any plans to expand at this time, he said.
Romo said FedEx is in a triangle shaped space on the south side of the airport. He said its space narrows so FedEx and LAWA officials are trying "make better utilization," of the space.
Reach Liset via email, call her at 909-483-8556, or find her on Twitter @DBOntarioNow.