AirHint found the following cheapest return flights from London (LON) to Mombasa (MBA) in September 2025 (see full year).

Return flights

20 Sep - 04 Oct	Ryanair
23 Sep - 13 Oct	Ryanair
23 Sep - 30 Sep	Ryanair
23 Sep - 09 Oct	Ryanair
20 Sep - 08 Oct	Ryanair
23 Sep - 22 Oct	Ryanair
20 Sep - 30 Sep	Ryanair
16 Sep - 30 Sep	Ryanair
20 Sep - 15 Oct	Ryanair
21 Sep - 15 Oct	Ryanair
23 Sep - 21 Oct	Ryanair
16 Sep - 02 Oct	Ryanair
22 Sep - 02 Oct	Ryanair
23 Sep - 29 Sep	Ryanair
24 Sep - 30 Sep	Vueling Airlines
23 Sep - 28 Sep	Ryanair
20 Sep - 27 Sep	Ryanair
16 Sep - 25 Sep	Ryanair
18 Sep - 24 Sep	Ethiopian Airlines
22 Sep - 25 Sep	Vueling Airlines

Also check the deals for one-way flights from London to Mombasa 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 Mombasa in September from $621

Return flights