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

Return flights

22 Sep - 14 Oct	Brussels Airlines
24 Sep - 07 Oct	Brussels Airlines
23 Sep - 07 Oct	Brussels Airlines
22 Sep - 02 Oct	Brussels Airlines
22 Sep - 03 Oct	Brussels Airlines
22 Sep - 08 Oct	Brussels Airlines
22 Sep - 06 Oct	Brussels Airlines
22 Sep - 10 Oct	Brussels Airlines
28 Sep - 09 Oct	Brussels Airlines
24 Sep - 08 Oct	Brussels Airlines
08 Sep - 24 Sep	Brussels Airlines
16 Sep - 23 Sep	Saudia
04 Sep - 24 Sep	Saudia
04 Sep - 30 Sep	Saudia
18 Sep - 30 Sep	Saudia
14 Sep - 27 Sep	Saudia
14 Sep - 30 Sep	Saudia
16 Sep - 27 Sep	Saudia
09 Sep - 27 Sep	Saudia
16 Sep - 30 Sep	Saudia

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 449€

Return flights