The flight from New Zealand is scheduled for 19 November and the one from Australia is due to arrive on 24 November.
According to a travel advisory only Tongan citizens and permanent residents can enter Tonga at this time.
Most international flights have been cancelled, and options to leave are extremely limited.
A state of emergency is in force and activities are restricted to prevent the spread of Covid-19.
Meanwhile 251 repatriated passengers that arrived from Australia and New Zealand last week have tested negative for Covid-19.
Tonga remains Covid-19 free.