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

Return flights

21 Sep - 26 Sep	Pegasus Airlines
17 Sep - 30 Sep	Ryanair
01 Sep - 09 Sep	Pegasus Airlines
01 Sep - 16 Sep	Ryanair
23 Sep - 30 Sep	Ryanair
10 Sep - 17 Sep	AJet
08 Sep - 08 Oct	Pegasus Airlines
29 Sep - 06 Oct	Ryanair
09 Sep - 14 Sep	Ryanair
19 Sep - 12 Oct	Pegasus Airlines
10 Sep - 24 Sep	Ryanair
01 Sep - 23 Sep	Ryanair
10 Sep - 01 Oct	Ryanair
10 Sep - 30 Sep	Ryanair
06 Sep - 10 Oct	Pegasus Airlines
12 Sep - 13 Oct	Pegasus Airlines
08 Sep - 03 Oct	AJet
08 Sep - 22 Oct	Pegasus Airlines
25 Sep - 10 Oct	Ryanair
13 Sep - 03 Oct	Ryanair

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 549€

Return flights