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

Return flights

19 Aug - 26 Aug	Air Canada
26 Aug - 02 Sep	Air Canada
04 Aug - 11 Aug	Air Canada
17 Aug - 24 Aug	Lufthansa
10 Aug - 17 Aug	Lufthansa
16 Aug - 23 Aug	Air Canada
13 Aug - 20 Aug	Air Canada
06 Aug - 13 Aug	Air Canada
20 Aug - 27 Aug	Air Canada
27 Aug - 03 Sep	Air Canada
05 Aug - 12 Aug	Air Canada
12 Aug - 19 Aug	Air Canada
25 Aug - 01 Sep	Air Canada
28 Aug - 04 Sep	Air Canada
31 Aug - 07 Sep	Lufthansa
30 Aug - 06 Sep	Air Canada
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 821€

Return flights