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

Return flights

17 Sep - 17 Sep	Jet2	direct
29 Sep - 24 Oct	easyJet	direct
29 Sep - 22 Oct	easyJet	direct
29 Sep - 23 Oct	easyJet	direct
30 Sep - 24 Oct	easyJet	direct
30 Sep - 22 Oct	easyJet	direct
30 Sep - 23 Oct	easyJet	direct
23 Sep - 22 Oct	easyJet	direct
23 Sep - 23 Oct	easyJet	direct
17 Sep - 23 Sep	Ryanair	direct
21 Sep - 23 Sep	easyJet	direct
22 Sep - 22 Oct	easyJet	direct
22 Sep - 23 Oct	easyJet	direct
17 Sep - 24 Sep	Ryanair	direct
17 Sep - 25 Sep	easyJet	direct
29 Sep - 30 Sep	easyJet
22 Sep - 24 Sep	easyJet
25 Sep - 30 Sep	easyJet
23 Sep - 30 Sep	easyJet
20 Sep - 23 Sep	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 $124

Return flights