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

Return flights

24 Sep - 25 Sep	easyJet
24 Sep - 29 Sep	easyJet
24 Sep - 01 Oct	easyJet
24 Sep - 26 Sep	easyJet
24 Sep - 28 Sep	easyJet
26 Sep - 29 Sep	easyJet
28 Sep - 30 Sep	Air Serbia
10 Sep - 23 Sep	Vueling Airlines
10 Sep - 13 Sep	Vueling Airlines
01 Sep - 09 Oct	Vueling Airlines
27 Sep - 28 Sep	easyJet
04 Sep - 24 Sep	easyJet
11 Sep - 13 Oct	Austrian Airlines
01 Sep - 24 Oct	Vueling Airlines
17 Sep - 05 Oct	SKY express
17 Sep - 03 Oct	SKY express
30 Sep - 19 Oct	SKY express
16 Sep - 05 Oct	SKY express
24 Sep - 10 Oct	SKY express
24 Sep - 12 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 $146

Return flights