Cheapest return flights from Montreal to Sofia in September from $798

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

Return flights

24 Sep - 01 Oct Air Transat
01 Sep - 08 Sep Air Transat
27 Sep - 04 Oct British Airways
07 Sep - 14 Sep Air Transat
13 Sep - 20 Sep British Airways
16 Sep - 23 Sep FrenchBee
08 Sep - 15 Sep Air Transat
15 Sep - 22 Sep Air Transat
20 Sep - 27 Sep FrenchBee
17 Sep - 24 Sep WestJet
10 Sep - 17 Sep Air Transat
02 Sep - 09 Sep FrenchBee
25 Sep - 02 Oct Air Transat
30 Sep - 07 Oct FrenchBee
26 Sep - 03 Oct Air Transat
28 Sep - 05 Oct FrenchBee
29 Sep - 06 Oct Air Transat

Also check the deals for one-way flights from Montreal to Sofia in September.

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