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

Return flights

22 Sep - 05 Oct	AJet
28 Sep - 08 Oct	AJet
28 Sep - 10 Oct	AJet
22 Sep - 08 Oct	AJet
16 Sep - 15 Oct	AJet
20 Sep - 05 Oct	AJet
21 Sep - 05 Oct	AJet
28 Sep - 12 Oct	AJet
28 Sep - 03 Oct	AJet
25 Sep - 08 Oct	Pegasus Airlines
21 Sep - 24 Sep	AJet
18 Sep - 22 Sep	Pegasus Airlines
09 Sep - 22 Sep	Pegasus Airlines
25 Sep - 29 Sep	AJet
22 Sep - 30 Sep	AJet
23 Sep - 30 Sep	AJet
21 Sep - 27 Sep	AJet
16 Sep - 23 Sep	AJet
20 Sep - 23 Sep	AJet
15 Sep - 28 Sep	AJet

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 $501

Return flights