AirHint found the following cheapest return flights from Calgary (YYC) to Sydney (SYD) in August 2025 (see full year).

Return flights

19 Aug - 14 Sep	Alaska Airlines
13 Aug - 27 Aug	WestJet
15 Aug - 22 Aug	WestJet
17 Aug - 14 Sep	WestJet
01 Aug - 08 Aug	WestJet
18 Aug - 22 Sep	WestJet
25 Aug - 22 Sep	WestJet
19 Aug - 22 Sep	Alaska Airlines
21 Aug - 22 Sep	WestJet
17 Aug - 22 Sep	Air Canada
23 Aug - 22 Sep	WestJet
09 Aug - 12 Aug	WestJet
13 Aug - 26 Aug	WestJet
24 Aug - 31 Aug	WestJet
24 Aug - 22 Sep	Air Canada
03 Aug - 13 Aug	WestJet
30 Aug - 09 Sep	United
11 Aug - 22 Aug	Delta

Also check the deals for one-way flights from Calgary to Sydney in August.

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 Calgary to Sydney in August from 782€

Return flights