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

Return flights

24 Sep - 15 Oct	Ryanair	direct
24 Sep - 08 Oct	Ryanair	direct
24 Sep - 11 Oct	Ryanair	direct
25 Sep - 01 Oct	TUI	direct
24 Sep - 04 Oct	Ryanair	direct
30 Sep - 25 Oct	Ryanair
29 Sep - 01 Oct	Ryanair
23 Sep - 28 Sep	Ryanair
25 Sep - 02 Oct	TUI
25 Sep - 30 Sep	TUI
26 Sep - 01 Oct	SKY express
30 Sep - 23 Oct	Ryanair
27 Sep - 29 Sep	transavia
28 Sep - 30 Sep	Aegean Airlines

Also check the deals for one-way flights from Keffallinia to London 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 Keffallinia to London in September from 117€

Return flights