International flights (including flights from South Africa) to Windhoek (Namibia) take place through Windhoek's Hosea Kutako International Airport . If you want to get on a cheap flight to Windhoek:
type your flight details into the search engine on the left (i.e. if you're flying to Windhoek, leave the word Windhoek as it is but replace Johannesburg with the city you're flying from, and enter the date of your outbound flight to Windhoek and the date of your return flight from Windhoek).
check the airfare of every airline flying your route to Windhoek. Below is a list of direct flight routes from South Africa to Windhoek. Click on the flight route to Windhoek that you're taking, and the webpage will list the airlines operating flights to Windhoek from the city you're leaving from. Go to each airline's webpage and note what it charges you to fly to Windhoek.
Venture into the Katutura township (black township/ghetto), preferably with a guide to tell you the history of Katutura. Visit the tourism information office on Independence Ave to find a guide.
See Saint Mary's Cathedral
View Christuskirche, a beautiful Lutheran church, built in in April 1896 under Pastor Wilhelm Anz
View the monstrous presidential home
See the colonial parliament building.
See the meteorites from the Gibeon meteorite shower.
View the statue of the Kudu.
Visit the National Botanical Garden, watch the dassies running around the indigenous plants. There are guided walks on the first Saturday of every month (or 2nd if the first Saturday falls on a public holiday).
See the statue to fallen German soldiers.
Windhoek's Hosea Kutako International Airport
Windhoek's Hosea Kutako International Airport was built in 1964, and is located 42km outside of Windhoek. There are no public buses running to the International Airport. People would be well-advised to book a (private) airport shuttle in advance if they are not renting a car. Try Omahuka Transfers, but there are a number of companies who offer airport shuttles.