Cheap flights from Istanbul to Sofia
Cheapest current fares: $63 in September 2026, 468 km direct flight in ~33m.
Cheapest month-by-month fares
Lowest available fare per calendar month from Istanbul (IST) to Sofia (SOF). Refreshed daily.
Istanbul (IST) → Sofia (SOF)
- September 2026 $63
- August 2026 $64
- October 2026 $65
- December 2026 $80
- November 2026 $84
- January 2027 $89
Frequently asked questions
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What is the cheapest month to fly from Istanbul to Sofia?
Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Istanbul (IST) to Sofia (SOF), with fares starting from $63.
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What is the lowest current fare from IST to SOF?
The lowest currently-listed fare from Istanbul (IST) to Sofia (SOF) is $63 on 2026-09-04.
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How long is the flight from Istanbul to Sofia?
Direct flights from IST to SOF cover approximately 468 km (291 miles), with an estimated flight time of 33m. Operating airlines: TK.
Related guides for this route
Sibling pages — full route detail, airport overviews, visa context, per-airline routes.