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

Return flights

26 Sep - 29 Sep	easyJet
08 Sep - 27 Sep	easyJet
27 Sep - 29 Sep	easyJet
08 Sep - 17 Sep	easyJet
26 Sep - 03 Oct	easyJet
20 Sep - 24 Sep	easyJet
20 Sep - 23 Sep	easyJet
14 Sep - 18 Oct	Air Serbia
26 Sep - 28 Sep	Air Serbia
22 Sep - 28 Sep	Air Serbia
25 Sep - 28 Sep	Air Serbia
24 Sep - 28 Sep	Air Serbia
27 Sep - 05 Oct	Air Serbia
27 Sep - 01 Oct	LOT
01 Sep - 01 Oct	LOT
23 Sep - 10 Oct	SKY express
23 Sep - 12 Oct	SKY express
24 Sep - 10 Oct	SKY express
24 Sep - 12 Oct	SKY express
23 Sep - 03 Oct	SKY express

Also check the deals for one-way flights from Paris 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 Paris to Sofia in September from 132€

Return flights