Despite the airport resuming operations around 6 am after Monday's suspension of operations, Hong Kong flag carrier Cathay Pacific said it had cancelled more than 200 flights to and out of the airport on Tuesday, according to its website. Cathay also said it had suspended with immediate effect on Tuesday a second officer operating flight CX216 for misuse of company information, and had also commenced internal disciplinary proceedings.

According to an Air China statement, the carrier on Tuesday cancelled six flights from Hong Kong to Beijing and other mainland cities, and seven flights from those cities to Hong Kong. China Eastern, another major mainland carrier, cancelled six flights between Hong Kong and mainland cities.

"The AA has noticed that there are calls online for public assembly in the airport this afternoon," the authority said in a statement early Tuesday. "The AA will work closely with its business partners with a view to gradually resuming normal airport operations as soon as possible." The Airport Authority Hong Kong started rescheduling flights at 6 am on Tuesday.