AirHint found the following cheapest return flights from Thessaloniki (SKG) to Sofia (SOF) in December 2025 (see full year).

Return flights

05 Dec - 08 Dec	Ryanair
15 Dec - 15 Dec	Aegean Airlines
06 Dec - 08 Dec	Ryanair
04 Dec - 11 Dec	Ryanair
05 Dec - 07 Dec	Ryanair
18 Dec - 21 Dec	Ryanair
03 Dec - 04 Dec	Aegean Airlines
03 Dec - 12 Dec	Aegean Airlines
28 Dec - 31 Dec	Ryanair
04 Dec - 07 Dec	Aegean Airlines
26 Dec - 05 Jan	SKY express
26 Dec - 01 Jan	SKY express
26 Dec - 12 Jan	SKY express
21 Dec - 05 Jan	SKY express
21 Dec - 01 Jan	SKY express
14 Dec - 01 Jan	SKY express
28 Dec - 05 Jan	SKY express
28 Dec - 01 Jan	SKY express
15 Dec - 01 Jan	SKY express
19 Dec - 05 Jan	SKY express

Also check the deals for one-way flights from Thessaloniki 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 return flights from Thessaloniki to Sofia in December from 153€

Return flights