Cheap flights from Bucharest to Sofia

Cheapest current fares: $43 in September 2026, 300 km direct flight in ~21m.

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Live fares · OTP → SOF

Cheapest month-by-month fares

Lowest available fare per calendar month from Bucharest (OTP) to Sofia (SOF). Refreshed daily.

Bucharest (OTP) → Sofia (SOF)

  1. September 2026 $43
  2. October 2026 $58
  3. August 2026 $59

Frequently asked questions

  • What is the cheapest month to fly from Bucharest to Sofia?

    Based on current 6-month forward fare data, September 2026 is the cheapest month to fly from Bucharest (OTP) to Sofia (SOF), with fares starting from $43.

  • What is the lowest current fare from OTP to SOF?

    The lowest currently-listed fare from Bucharest (OTP) to Sofia (SOF) is $43 on 2026-09-28.

  • How long is the flight from Bucharest to Sofia?

    Direct flights from OTP to SOF cover approximately 300 km (186 miles), with an estimated flight time of 21m. Operating airlines: RO.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.

Full route page: OTP → SOF Cheapest month to fly to Sofia All flights from Bucharest All flights to Sofia Flights to Bulgaria Visa-free with Romania passport RO routes