Cheapest return flights from Bucharest to Sofia in September from 149€

Best time to book flights for Bucharest (OTP) to Sofia (SOF) flights at AirHint

AirHint found the following cheapest return flights from Bucharest (OTP) to Sofia (SOF) in September 2025 (see full year).

Return flights

29 Sep - 30 Sep Air Serbia
08 Sep - 09 Sep Air Serbia
26 Sep - 29 Sep Air Serbia
27 Sep - 29 Sep Air Serbia
24 Sep - 29 Sep Aegean Airlines
29 Sep - 29 Sep Austrian Airlines
29 Sep - 30 Sep TAROM direct
27 Sep - 29 Sep TAROM direct
08 Sep - 09 Sep TAROM direct
24 Sep - 29 Sep TAROM direct

Also check the deals for one-way flights from Bucharest to Sofia in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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