AirHint found the following cheapest return flights from Keffallinia (EFL) to Oslo (OSL) in May 2026 (see full year).
Return flights
| 01 May - 31 May | Jet2 | ||
| 02 May - 31 May | easyJet |
Also check the deals for one-way flights from Keffallinia to Oslo in May.
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