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

Return flights

20 Apr - 27 Apr	FrenchBee
22 Apr - 10 May	FrenchBee
29 Apr - 06 May	FrenchBee
30 Apr - 25 May	FrenchBee
15 Apr - 30 Apr	FrenchBee
26 Apr - 03 May	Air Transat
30 Apr - 07 May	FrenchBee
22 Apr - 29 Apr	FrenchBee
01 Apr - 08 Apr	FrenchBee
08 Apr - 15 Apr	FrenchBee
27 Apr - 04 May	FrenchBee
13 Apr - 20 Apr	FrenchBee
19 Apr - 26 Apr	FrenchBee
15 Apr - 22 Apr	FrenchBee
15 Apr - 30 May	FrenchBee
06 Apr - 13 Apr	FrenchBee
05 Apr - 12 Apr	FrenchBee
18 Apr - 01 May	Porter Airlines (Canada) Ltd
24 Apr - 01 May	FrenchBee
28 Apr - 05 May	Porter Airlines (Canada) Ltd

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

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 April from $658

Return flights