AirHint found the following cheapest one-way flights from Madrid (MAD) to Sofia (SOF) in December 2025 (see full year).

One-Way flights

08 Dec	Ryanair	direct
06 Dec	Ryanair	direct
02 Dec	Ryanair	direct
16 Dec	Ryanair	direct
13 Dec	Ryanair	direct
04 Dec	Ryanair	direct
05 Dec	Iberia
12 Dec	Wizz Air	direct
22 Dec	Air Serbia
25 Dec	Air Serbia

Also check the deals for return flights from Madrid to Sofia in December.

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 one-way flights from Madrid to Sofia in December from $53

One-Way flights