Cheapest return flights from Montreal to Sydney in September from $1331

Best time to book flights for Montreal (YUL) to Sydney (SYD) flights at AirHint

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

Return flights

21 Sep - 28 Sep United
02 Sep - 09 Sep United
08 Sep - 15 Sep United
10 Sep - 17 Sep United
14 Sep - 21 Sep United
16 Sep - 23 Sep United
22 Sep - 29 Sep United
24 Sep - 01 Oct United
28 Sep - 05 Oct United
30 Sep - 07 Oct United
04 Sep - 11 Sep United
06 Sep - 13 Sep United
12 Sep - 19 Sep United
25 Sep - 02 Oct United
26 Sep - 03 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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