AirHint found the following cheapest return flights from Montreal (YUL) to Sydney (SYD) in June 2025 (see full year).

Return flights

27 Jun - 04 Jul	Porter Airlines (Canada) Ltd
18 Jun - 25 Jun	United
23 Jun - 30 Jun	United
29 Jun - 06 Jul	Porter Airlines (Canada) Ltd
12 Jun - 19 Jun	United
25 Jun - 02 Jul	Porter Airlines (Canada) Ltd
28 Jun - 05 Jul	United
22 Jun - 29 Jun	Porter Airlines (Canada) Ltd
24 Jun - 01 Jul	United
20 Jun - 27 Jun	Porter Airlines (Canada) Ltd
30 Jun - 07 Jul	ANA
15 Jun - 22 Jun	United
15 Jun - 29 Jun	FrenchBee
14 Jun - 21 Jun	Qantas
20 Jun - 23 Jun	Porter Airlines (Canada) Ltd
19 Jun - 26 Jun	WestJet
26 Jun - 03 Jul	ANA
15 Jun - 03 Jul	United

Also check the deals for one-way flights from Montreal to Sydney in June.

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 Sydney in June from $1559

Return flights