Summer travel on US airlines is expected to reach an all-time high in 2016, adding to concern that travellers may face even longer airport security lines.

Washington-based trade group Airlines for America says about 231 million passengers will fly on US airlines from June through August, up four per cent from the same period in 2015. That estimate amounts to an extra 95,500 passengers per day, on average.

Read more: Long airport lines? Send in the clowns

The group has called on the US Transportation Security Administration (TSA) to quickly hire and train new staff to cut waiting times at airports. Security wait times have stretched longer than two hours at some US airports this northern spring.

Advertisement

US airlines have created a website for travellers to vent and share wait times for specific airports, and encouraged customers to enroll in a pre-screening program known as TSA PreCheck to help expedite security checks.

Separately, American Airlines Group Inc plans to spend US$4 million ($5.9 million) on top of the US$17 million ($25 million) it allocates annually to staff it contracts to help TSA officers stock bins at checkpoints and manage queues, Chief Operating Officer Robert Isom said in a letter to employees on Wednesday, shared with Reuters.

TSA lines now "evoke frustration from all of us, as well as our customers who continue to miss flights due to lines that are literally out the door," Isom said.

Jeh Johnson, secretary of the US Department of Homeland Security, which oversees TSA, on Friday said Congress had approved his request for US$34 million ($50 million) to hire additional officers and pay overtime to manage the long lines.

- AAP