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

Return flights

22 Sep - 15 Oct	Vueling Airlines
22 Sep - 22 Oct	Wizz Air UK
22 Sep - 07 Oct	Ryanair
23 Sep - 13 Oct	Ryanair
23 Sep - 14 Oct	Ryanair
22 Sep - 13 Oct	Wizz Air UK
25 Sep - 15 Oct	Wizz Air Malta
22 Sep - 05 Oct	Vueling Airlines
22 Sep - 02 Oct	Ryanair
23 Sep - 20 Oct	Ryanair
25 Sep - 28 Sep	Wizz Air Malta
22 Sep - 29 Sep	Wizz Air UK
27 Sep - 30 Sep	Kenya Airways
29 Sep - 30 Sep	Kenya Airways
21 Sep - 28 Sep	Ryanair
26 Sep - 30 Sep	EgyptAir
24 Sep - 28 Sep	Wizz Air Malta
19 Sep - 29 Sep	Wizz Air
19 Sep - 28 Sep	Jet2
19 Sep - 26 Sep	Pegasus 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 497€

Return flights