We've gone through lots of different flights, to help you find the cheapest way to get from London Heathrow to Zanzibar. You can choose from zero airlines.
If you can't find a flight time that suits you, why not look at flying out from a different airport?
The distance between London Heathrow to Zanzibar is 7449 km. You can see the various flight times in the results.
If you want to travel in December, it's best to book your flights early, as this is peak season in Zanzibar. The cheapest month to fly is normally March – try searching three to four months prior to then to get a bargain. You can also search by month, which will reveal the cheapest time of the week to fly.