AirHint found the following cheapest return flights from Chicago (ORD) to Sydney (SYD) in August 2026 (see full year).
Return flights
| 25 Aug - 03 Sep | Air Canada | ||
| 14 Aug - 27 Aug | Air Canada | ||
| 10 Aug - 17 Aug | Etihad Airways | ||
| 21 Aug - 29 Aug | Alaska Airlines | ||
| 05 Aug - 10 Aug | Air Canada | ||
| 27 Aug - 31 Aug | Air Canada | ||
| 13 Aug - 28 Aug | United |
Also check the deals for one-way flights from Chicago to Sydney in August.
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