Cheapest return flights from Montreal to Sydney in September from $988

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

Return flights

05 Sep - 12 Sep WestJet
10 Sep - 17 Sep Porter Airlines (Canada) Ltd
03 Sep - 10 Sep Porter Airlines (Canada) Ltd
17 Sep - 24 Sep Porter Airlines (Canada) Ltd
12 Sep - 19 Sep Porter Airlines (Canada) Ltd
14 Sep - 21 Sep WestJet
10 Sep - 28 Sep Porter Airlines (Canada) Ltd
06 Sep - 13 Sep Porter Airlines (Canada) Ltd
08 Sep - 15 Sep Porter Airlines (Canada) Ltd
11 Sep - 18 Sep Porter Airlines (Canada) Ltd
16 Sep - 15 Oct Air New Zealand
27 Sep - 04 Oct Air Canada
24 Sep - 01 Oct Porter Airlines (Canada) Ltd
25 Sep - 02 Oct Porter Airlines (Canada) Ltd
29 Sep - 06 Oct Air Canada
26 Sep - 03 Oct Porter Airlines (Canada) Ltd
25 Sep - 04 Oct Porter Airlines (Canada) Ltd
28 Sep - 05 Oct Porter Airlines (Canada) Ltd
30 Sep - 07 Oct United

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

Skyscanner

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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