Cheapest return flights from Montreal to Sydney in September from $1513

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

Return flights

24 Sep - 01 Oct Porter Airlines (Canada) Ltd
30 Sep - 07 Oct WestJet
26 Sep - 03 Oct Porter Airlines (Canada) Ltd
25 Sep - 02 Oct Porter Airlines (Canada) Ltd
22 Sep - 29 Sep United
21 Sep - 28 Sep United
23 Sep - 30 Sep United
29 Sep - 06 Oct United
28 Sep - 05 Oct United
19 Sep - 26 Sep WestJet
20 Sep - 27 Sep United
27 Sep - 04 Oct United
23 Sep - 29 Sep Qantas

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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