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

Return flights

08 Sep - 22 Sep	Air France
22 Sep - 08 Oct	Air France
22 Sep - 07 Oct	Air France
23 Sep - 30 Sep	Air France
21 Sep - 07 Oct	Air France
05 Sep - 12 Sep	Air France
05 Sep - 20 Sep	Air France
15 Sep - 22 Sep	Pegasus Airlines
20 Sep - 05 Oct	Air France
18 Sep - 21 Sep	Turkish Airlines
12 Sep - 17 Sep	Air France

Also check the deals for one-way flights from Sofia to Singapore 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 Sofia to Singapore in September from $630

Return flights