The cheapest Istanbul to Bastia return flight on the radar right now is €487, flying with Air France via one or more connections. It covers departures in November 2026, and every dated link below opens that exact IST–BIA search on Skyscanner. The price we usually record on this route is €329. Across 29 recorded checks it has ranged between €222 and €511. Our sampling points to November 2026 as the cheapest month to fly Istanbul to Bastia.
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 Istanbul? We track 57 other departure cities for Bastia, 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 Istanbul to Bastia is often still worth booking within a day or two of the fare we found.