AirHint found the following cheapest return flights from Sydney (SYD) to Porto (OPO) in December 2025 (see full year).
Return flights
| 13 Dec - 15 Dec | Batik Air Malaysia | ||
| 23 Dec - 03 Jan | Hainan Airlines | ||
| 08 Dec - 30 Dec | Emirates | ||
| 20 Dec - 27 Dec | Etihad Airways | ||
| 16 Dec - 06 Jan | Etihad Airways |
Also check the deals for one-way flights from Sydney to Porto in December.
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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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