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

Return flights

22 Sep - 07 Oct	Ryanair
16 Sep - 07 Oct	Pegasus Airlines
09 Sep - 25 Sep	Ryanair
22 Sep - 05 Oct	Ryanair
23 Sep - 07 Oct	Ryanair
09 Sep - 07 Oct	Ryanair
27 Sep - 11 Oct	Pegasus Airlines
09 Sep - 14 Sep	Ryanair
28 Sep - 06 Oct	Ryanair
08 Sep - 14 Sep	Ryanair
08 Sep - 10 Sep	Ryanair
09 Sep - 21 Sep	Ryanair
03 Sep - 01 Oct	Ryanair
18 Sep - 24 Sep	Ryanair
28 Sep - 05 Oct	Ryanair
24 Sep - 05 Oct	Ryanair
13 Sep - 21 Sep	Pegasus Airlines
02 Sep - 30 Sep	Ryanair
11 Sep - 17 Sep	Pegasus Airlines
16 Sep - 30 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 568€

Return flights