AirHint found the following cheapest return flights from Toronto (YYZ) to Sofia (SOF) in August 2025 (see full year).

Return flights

24 Aug - 15 Sep	WestJet
21 Aug - 13 Sep	WestJet
16 Aug - 13 Sep	WestJet
23 Aug - 13 Sep	WestJet
10 Aug - 13 Sep	Air Transat
16 Aug - 21 Aug	WestJet
09 Aug - 13 Sep	WestJet
01 Aug - 24 Aug	Air Transat
01 Aug - 04 Aug	Air Transat
24 Aug - 13 Sep	KLM
24 Aug - 14 Sep	KLM

Also check the deals for one-way flights from Toronto to Sofia in August.

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 Toronto to Sofia in August from $632

Return flights