AirHint found the following cheapest return flights from London (LHR) to Zanzibar (ZNZ) in September 2025 (see full year).

Return flights

18 Sep - 25 Sep	KLM
25 Sep - 05 Oct	KLM
04 Sep - 11 Sep	KLM
25 Sep - 08 Oct	Kenya Airways
24 Sep - 05 Oct	Kenya Airways
25 Sep - 23 Oct	Kenya Airways
02 Sep - 30 Sep	EgyptAir
29 Sep - 08 Oct	KLM
25 Sep - 09 Oct	KLM
04 Sep - 18 Sep	KLM
28 Sep - 05 Oct	KLM
04 Sep - 10 Sep	KLM
28 Sep - 14 Oct	KLM
19 Sep - 05 Oct	Kenya Airways
04 Sep - 24 Sep	KLM
16 Sep - 25 Sep	Ethiopian Airlines
18 Sep - 26 Sep	KLM
04 Sep - 13 Sep	KLM
01 Sep - 22 Sep	KLM
25 Sep - 03 Oct	KLM

Also check the deals for one-way flights from London to Zanzibar in September.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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Cheapest return flights from London to Zanzibar in September from 654€

Return flights