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

Return flights

10 Dec - 13 Dec	Aegean Airlines
05 Dec - 07 Dec	Aegean Airlines
11 Dec - 14 Dec	Aegean Airlines
30 Dec - 03 Jan	Aegean Airlines
12 Dec - 14 Dec	Aegean Airlines
06 Dec - 09 Dec	Aegean Airlines
13 Dec - 17 Dec	Aegean Airlines
01 Dec - 05 Dec	Aegean Airlines
11 Dec - 15 Dec	Aegean Airlines
29 Dec - 11 Jan	Aegean Airlines
18 Dec - 23 Dec	Aegean Airlines
29 Dec - 02 Jan	Aegean Airlines
05 Dec - 05 Dec	SKY express

Also check the deals for one-way flights from Heraklion 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 Heraklion to Sofia in December from $130

Return flights