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

Return flights

27 Sep - 15 Oct	Ryanair	direct
24 Sep - 08 Oct	Ryanair	direct
10 Sep - 17 Sep	Ryanair	direct
27 Sep - 08 Oct	Ryanair	direct
17 Sep - 24 Sep	Ryanair	direct
09 Sep - 17 Sep	Ryanair
02 Sep - 17 Sep	Ryanair
11 Sep - 17 Sep	Ryanair
06 Sep - 10 Sep	Ryanair
06 Sep - 17 Sep	Ryanair
16 Sep - 24 Sep	Ryanair
01 Sep - 10 Sep	Ryanair
03 Sep - 10 Sep	Ryanair
29 Sep - 08 Oct	Ryanair
27 Sep - 09 Oct	Ryanair
24 Sep - 01 Oct	Ryanair	direct
29 Sep - 06 Oct	Ryanair
24 Sep - 11 Oct	Ryanair	direct
20 Sep - 18 Oct	Ryanair
20 Sep - 08 Oct	Ryanair	direct

Also check the deals for one-way flights from London to Keffallinia 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 Keffallinia in September from $121

Return flights