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

Return flights

16 Sep - 18 Sep	Pegasus Airlines
30 Sep - 05 Oct	easyJet
20 Sep - 23 Sep	ITA Airways
11 Sep - 16 Sep	Pegasus Airlines
23 Sep - 24 Sep	easyJet
24 Sep - 25 Sep	easyJet
23 Sep - 26 Sep	easyJet
18 Sep - 23 Sep	Pegasus Airlines
21 Sep - 30 Oct	Pegasus Airlines
15 Sep - 23 Sep	Pegasus Airlines
20 Sep - 27 Sep	Pegasus Airlines
22 Sep - 23 Sep	easyJet
30 Sep - 15 Oct	easyJet
30 Sep - 03 Oct	easyJet
30 Sep - 07 Oct	easyJet
29 Sep - 02 Oct	easyJet
29 Sep - 03 Oct	easyJet
28 Sep - 03 Oct	Pegasus Airlines
27 Sep - 04 Oct	easyJet
13 Sep - 11 Oct	SWISS

Also check the deals for one-way flights from Zurich 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 Zurich to Sofia in September from 159€

Return flights