AirHint found the following cheapest return flights from London (LCY) to Nairobi (NBO) in September 2025 (see full year).

Return flights

24 Sep - 05 Oct	KLM
25 Sep - 03 Oct	Kenya Airways
29 Sep - 07 Oct	Kenya Airways
30 Sep - 07 Oct	Kenya Airways
02 Sep - 23 Sep	British Airways
16 Sep - 23 Sep	Kenya Airways
25 Sep - 30 Sep	Kenya Airways
09 Sep - 07 Oct	Kenya Airways
05 Sep - 15 Sep	Kenya Airways
02 Sep - 15 Sep	Kenya Airways
05 Sep - 28 Sep	KLM
23 Sep - 30 Sep	Kenya Airways
01 Sep - 15 Sep	Kenya Airways
30 Sep - 03 Oct	Kenya Airways
04 Sep - 10 Sep	Kenya Airways
05 Sep - 14 Sep	KLM
30 Sep - 10 Oct	Kenya Airways
02 Sep - 02 Oct	KLM
03 Sep - 03 Oct	Kenya Airways
29 Sep - 09 Oct	KLM

Also check the deals for one-way flights from London to Nairobi 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 Nairobi in September from $813

Return flights