The cheapest Athens to Olbia return flight on the radar right now is €287, flying with Vueling Airlines via one or more connections. It covers departures in June 2027, and every dated link below opens that exact ATH–OLB search on Skyscanner. The price we usually record on this route is €264. Across 70 recorded checks it has ranged between €117 and €517. Our sampling points to June 2027 as the cheapest month to fly Athens to Olbia.
Prices are re-checked against Skyscanner automatically, and every one shows when it was last confirmed, so nothing here is older than it looks. Not flying from Athens? We track 48 other departure cities for Olbia, listed at the foot of this page.
Prices like this tend to vanish fast. If it has gone when you look, try the days either side of the dates above, since Athens to Olbia is often still worth booking within a day or two of the fare we found.