AirHint found the following cheapest return flights from Montreal (YUL) to Zagreb (ZAG) in May 2026 (see full year).

Return flights

03 May - 10 May	Air Canada
04 May - 11 May	British Airways
06 May - 13 May	British Airways
08 May - 15 May	British Airways
05 May - 12 May	Air Canada
17 May - 24 May	Air Canada
11 May - 18 May	Air Canada
13 May - 20 May	Air Canada
12 May - 19 May	Air Canada
20 May - 27 May	Air Canada
25 May - 01 Jun	Air Canada
26 May - 02 Jun	Air Canada
28 May - 04 Jun	Air Canada
28 May - 14 Jun	Lufthansa
30 May - 06 Jun	Air Transat
27 May - 03 Jun	Lufthansa
29 May - 05 Jun	Lufthansa
31 May - 07 Jun	Air France

Also check the deals for one-way flights from Montreal to Zagreb in May.

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 Zagreb in May from $664

Return flights