Flight

Korea:

8-9 hours from Durban to Dubai. 
7-8 hours from Dubai to Korea

Alternatively:
1 hour to Jo'burg
15 hours to China (Beijing/ Hong Kong)
3-4 hours to Korea

Note: Seoul Airport = Incheon International Airport

Saudi:

8-9 hours from Durban to Dubai
2-3 hours Dubai to Saudi (Riyadh)