Cape Town to Zanzibar flights

You want to reserve the cheapest flight from Cape Town to Zanzibar (Tanzania). To make a cheap flight booking from Cape Town to Zanzibar:

type your date of departure and date of return into the flight price comparison and reservation tool and see what airfare it spits out
go to the flight reservation website of each airline operating flights from Cape Town to Zanzibar (websites of airlines flying from Cape Town to Zanzibar listed below)
Making a booking with the cheapest airline

There are no direct flights from Cape Town to Zanzibar.

Airline	Airports	Stops
1time	Cape Town International Airport (CPT) to Zanzibar International Airport (ZNZ)	1-stop Johannesburg

Another option is to fly from Cape Town to Dar es Salaam, and then take a ferry across to Zanzibar.