AirHint found the following cheapest return flights from Cardiff (CWL) to Keffallinia (EFL) in May 2026 (see full year).
Return flights
| 02 May - 04 May | Vueling Airlines | ||
| 26 May - 02 Jun | Aer Lingus | ||
| 04 May - 11 May | TUI | ||
| 26 May - 02 Jun | TUI | direct |
Also check the deals for one-way flights from Cardiff to Keffallinia in May.
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