AirHint found the following cheapest return flights from Orlando (MCO) to Sydney (SYD) in December 2025 (see full year).
Return flights
| 05 Dec - 12 Dec | Air Canada | ||
| 11 Dec - 25 Dec | Air Canada | ||
| 09 Dec - 30 Dec | Qantas | ||
| 25 Dec - 21 Jan | Frontier Airlines | ||
| 11 Dec - 14 Dec | Air Canada | ||
| 26 Dec - 10 Jan | Qantas |
Also check the deals for one-way flights from Orlando to Sydney in December.
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