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

Return flights

01 Sep - 01 Oct	Ryanair
09 Sep - 18 Sep	Ryanair
01 Sep - 09 Sep	Ryanair
01 Sep - 30 Sep	Ryanair
24 Sep - 06 Oct	Ryanair
02 Sep - 09 Sep	Ryanair
05 Sep - 19 Sep	Ryanair
25 Sep - 06 Oct	Ryanair
19 Sep - 30 Sep	Ryanair
30 Sep - 08 Oct	Ryanair
06 Sep - 19 Sep	Ryanair
15 Sep - 22 Sep	Ryanair
04 Sep - 14 Sep	Ryanair
09 Sep - 24 Sep	Ryanair
29 Sep - 13 Oct	Ryanair
25 Sep - 13 Oct	Ryanair
25 Sep - 15 Oct	Ryanair
25 Sep - 08 Oct	Ryanair
22 Sep - 22 Oct	Ryanair
11 Sep - 10 Oct	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 521€

Return flights