AirHint found the following cheapest return flights from Bucharest (OTP) to Sofia (SOF) in January 2026 (see full year).

Return flights

31 Jan - 07 Feb	Wizz Air Malta
22 Jan - 24 Jan	Ryanair
30 Jan - 01 Feb	Ryanair
23 Jan - 26 Jan	Ryanair
22 Jan - 26 Jan	Ryanair
29 Jan - 01 Feb	Ryanair
30 Jan - 06 Feb	Ryanair
29 Jan - 31 Jan	Ryanair
19 Jan - 22 Jan	Ryanair
22 Jan - 25 Jan	Ryanair
23 Jan - 30 Jan	Ryanair
20 Jan - 22 Jan	Wizz Air Malta
27 Jan - 28 Jan	Wizz Air Malta
20 Jan - 21 Jan	Wizz Air Malta
30 Jan - 06 Feb	TAROM	direct

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

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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Cheapest return flights from Bucharest to Sofia in January from 99€

Return flights