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

Return flights

06 Sep - 21 Sep	KLM
18 Sep - 21 Sep	KLM
19 Sep - 21 Sep	KLM
13 Sep - 21 Sep	KLM
02 Sep - 08 Sep	KLM
28 Sep - 04 Oct	KLM
04 Sep - 10 Sep	KLM
11 Sep - 14 Sep	KLM
06 Sep - 14 Sep	KLM
08 Sep - 28 Sep	KLM
09 Sep - 28 Sep	KLM
30 Sep - 23 Oct	KLM
30 Sep - 14 Oct	KLM
21 Sep - 01 Oct	KLM
22 Sep - 04 Oct	KLM
22 Sep - 06 Oct	KLM
28 Sep - 05 Oct	KLM
27 Sep - 04 Oct	KLM
26 Sep - 09 Oct	KLM
20 Sep - 05 Oct	KLM

Also check the deals for one-way flights from London to Cape Town 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 Cape Town in September from 631€

Return flights