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

Return flights

26 May - 03 Jun	Ryanair
02 May - 10 May	Jet2	direct
29 May - 07 Jun	Ryanair
26 May - 02 Jun	Ryanair
30 May - 06 Jun	Ryanair
09 May - 16 May	Jet2	direct
09 May - 15 May	Jet2
02 May - 09 May	Jet2	direct
13 May - 20 May	Jet2
13 May - 20 May	Jet2	direct
20 May - 03 Jun	Ryanair
26 May - 05 Jun	Ryanair
12 May - 17 May	Ryanair
03 May - 08 May	Jet2
11 May - 17 May	Ryanair
27 May - 03 Jun	Ryanair
07 May - 14 May	TUI	direct
01 May - 01 Jun	Ryanair
19 May - 02 Jun	Ryanair
31 May - 07 Jun	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 $276

Return flights