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

Return flights

19 Apr - 26 Apr	British Airways
06 Apr - 13 Apr	FrenchBee
27 Apr - 04 May	FrenchBee
20 Apr - 27 Apr	FrenchBee
13 Apr - 20 Apr	FrenchBee
08 Apr - 15 Apr	Air France
01 Apr - 08 Apr	Air France
28 Apr - 05 May	SWISS
14 Apr - 21 Apr	KLM
07 Apr - 14 Apr	KLM
21 Apr - 28 Apr	KLM
29 Apr - 06 May	Air Canada
22 Apr - 29 Apr	Turkish Airlines
24 Apr - 01 May	Turkish Airlines
30 Apr - 07 May	Lufthansa
25 Apr - 02 May	Air Canada

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 720€

Return flights