AirHint found the following cheapest return flights from Montreal (YUL) to Sofia (SOF) in August 2026 (see full year).

Return flights

25 Aug - 01 Sep	FrenchBee
09 Aug - 16 Aug	British Airways
16 Aug - 23 Aug	British Airways
18 Aug - 25 Aug	FrenchBee
11 Aug - 18 Aug	Air Transat
04 Aug - 11 Aug	FrenchBee
26 Aug - 02 Sep	Air Canada
27 Aug - 03 Sep	Air Transat
19 Aug - 26 Aug	Air Canada
10 Aug - 17 Aug	Air Canada
12 Aug - 19 Aug	Air Canada
17 Aug - 24 Aug	Air Canada
02 Aug - 09 Aug	British Airways
28 Aug - 04 Sep	Air Canada
31 Aug - 07 Sep	Air Canada
30 Aug - 06 Sep	Lufthansa
29 Aug - 05 Sep	Air Canada

Also check the deals for one-way flights from Montreal 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.

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Cheapest return flights from Montreal to Sofia in August from $855

Return flights