The cheapest Sofia to Mumbai return flight on the radar right now is €396, flying with British Airways via one or more connections. It covers departures in January 2027, and every dated link below opens that exact SOF–BOM search on Skyscanner. At 35% under the €609 we normally record here, it is one of the strongest SOF–BOM fares in our index. Across 53 recorded checks it has ranged between €394 and €685. Our sampling points to January 2027 as the cheapest month to fly Sofia to Mumbai.
Every fare here is re-confirmed against Skyscanner automatically, and each one is stamped with the moment it was last checked, so you can see how fresh it is instead of taking it on trust. Not flying from Sofia? We track 55 other departure cities for Mumbai, listed at the foot of this page.
Fares move quickly. If this Sofia to Mumbai price has gone by the time you search, shift the dates a day or two either side, because the same route is often still cheap just next door.