AirHint found the following cheapest return flights from London (STN) to Keffallinia (EFL) in May 2026 (see full year).

Return flights

03 May - 10 May	Jet2	direct
29 May - 05 Jun	Ryanair
13 May - 18 May	Jet2
29 May - 07 Jun	Ryanair
26 May - 01 Jun	Ryanair
30 May - 07 Jun	Ryanair
20 May - 03 Jun	Ryanair
05 May - 09 May	Ryanair
30 May - 14 Jun	Ryanair
17 May - 20 May	Jet2	direct
31 May - 07 Jun	Ryanair
26 May - 09 Jun	Ryanair
27 May - 05 Jun	Ryanair
16 May - 23 May	Jet2
05 May - 12 May	Ryanair
31 May - 14 Jun	Ryanair
19 May - 24 May	Ryanair
15 May - 22 May	Ryanair
14 May - 18 May	Ryanair
15 May - 25 May	Ryanair

Also check the deals for one-way flights from London to Keffallinia in May.

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 May from 247€

Return flights