Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from OR Tambo to Vladivostok as you normally would.
The Johannesburg OR Tambo to Vladivostok flight path was viewed by 22 users in the past month. Keep an eye out for changes in search interest prior to high and low season.
When travelling, it's generally smart to pack in preparation for rain or any other conditions that may arise. The rainfall in Johannesburg is roughly greater than that of Vladivostok. You can assume this to be the case over the next 19 days.
Temperatures around the 26 °Cs can be experienced in January. The weather in Vladivostok is colder than in Johannesburg. Plan for potential changes in flight availability as peak weather approaches in this location.