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

Return flights

21 Sep - 26 Sep	ITA Airways
17 Sep - 22 Sep	ITA Airways
27 Sep - 01 Oct	easyJet
30 Sep - 07 Oct	easyJet
05 Sep - 07 Sep	ITA Airways
05 Sep - 08 Sep	ITA Airways
30 Sep - 05 Oct	ITA Airways
17 Sep - 21 Sep	ITA Airways
29 Sep - 30 Sep	easyJet
20 Sep - 23 Sep	easyJet
29 Sep - 02 Oct	easyJet
30 Sep - 01 Oct	easyJet
29 Sep - 01 Oct	easyJet
19 Sep - 22 Sep	ITA Airways
30 Sep - 02 Oct	easyJet
20 Sep - 25 Sep	easyJet
24 Sep - 03 Oct	easyJet
12 Sep - 15 Sep	ITA Airways
25 Sep - 04 Oct	easyJet
30 Sep - 04 Oct	Lufthansa

Also check the deals for one-way flights from Milan 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.

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Cheapest return flights from Milan to Sofia in September from $175

Return flights