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

Return flights

19 Sep - 30 Sep	Aegean Airlines
16 Sep - 23 Sep	Aegean Airlines
28 Sep - 12 Oct	Aegean Airlines
16 Sep - 01 Oct	Aegean Airlines
18 Sep - 21 Sep	Aegean Airlines
19 Sep - 21 Sep	Aegean Airlines
14 Sep - 21 Sep	Aegean Airlines
08 Sep - 10 Sep	Ryanair
28 Sep - 12 Oct	Bulgaria Air	direct
02 Sep - 04 Sep	Aegean Airlines
28 Sep - 03 Oct	SKY express
14 Sep - 18 Sep	SKY express
21 Sep - 03 Oct	SKY express
28 Sep - 17 Oct	SKY express
14 Sep - 03 Oct	SKY express
14 Sep - 28 Sep	SKY express
14 Sep - 17 Sep	SKY express
19 Sep - 03 Oct	SKY express

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

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.

Book a cheap hotel in Sofia

Cheap car rent in Sofia

Cheapest return flights from Heraklion to Sofia in September from 121€

Return flights