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

Return flights

08 Sep - 21 Sep	Kenya Airways
15 Sep - 28 Sep	Kenya Airways
11 Sep - 28 Sep	Kenya Airways
01 Sep - 05 Oct	Kenya Airways
15 Sep - 21 Sep	Kenya Airways
18 Sep - 24 Sep	Kenya Airways
11 Sep - 21 Sep	Kenya Airways
15 Sep - 19 Sep	Kenya Airways
06 Sep - 17 Sep	Kenya Airways
06 Sep - 28 Sep	Kenya Airways
20 Sep - 30 Sep	Qatar Airways
12 Sep - 01 Oct	Turkish Airlines
17 Sep - 19 Oct	Qatar Airways
29 Sep - 07 Oct	Turkish Airlines
30 Sep - 16 Oct	Qatar Airways
30 Sep - 10 Oct	Qatar Airways

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 $723

Return flights