Coligny, Lichtenburg and Itsoseng were reportedly ‘relatively calm’ on Wednesday.
South African Cabin Crew Association (SACCA) members are on strike, demanding an increase in meal allowances.
Passengers are advised to stay in contact with the airline for updates on the status of flights and bookings.
Students embarked on protest action last week, claiming that the institution did not hand out study materials to some of them on time.
The SACP secretary-general says there has been a lack of political will to institute the inquiry because ‘those who are supposed to be taking the decisions are complicit’.