The cheapest Sofia to Cairo return flight on the radar right now is €223, flying with LOT via one or more connections. It covers departures in May 2027, and every dated link below opens that exact SOF–CAI search on Skyscanner. That is roughly 18% below the €272 this route usually costs. Across 106 recorded checks it has ranged between €203 and €596. Our sampling points to May 2027 as the cheapest month to fly Sofia to Cairo.
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 Sofia? We track 62 other departure cities for Cairo, 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 Sofia to Cairo is often still worth booking within a day or two of the fare we found.