AirHint found the following cheapest return flights from Kaohsiung (KHH) to Sydney (SYD) in December 2025 (see full year).

Return flights

23 Dec - 12 Jan	VietJet Air
27 Dec - 25 Jan	VietJet Air
23 Dec - 13 Jan	VietJet Air
28 Dec - 13 Jan	VietJet Air
18 Dec - 05 Jan	VietJet Air
25 Dec - 30 Dec	VietJet Air
08 Dec - 14 Dec	VietJet Air
27 Dec - 05 Jan	Thai AirAsia
24 Dec - 31 Dec	Philippines AirAsia Inc.
12 Dec - 15 Dec	VietJet Air
29 Dec - 05 Jan	VietJet Air
25 Dec - 28 Dec	VietJet Air
28 Dec - 06 Jan	VietJet Air
25 Dec - 01 Jan	VietJet Air
29 Dec - 04 Jan	VietJet Air
10 Dec - 17 Dec	HK Express
09 Dec - 16 Dec	VietJet Air
06 Dec - 13 Dec	HK Express
10 Dec - 14 Dec	VietJet Air
18 Dec - 22 Dec	Vietnam Airlines

Also check the deals for one-way flights from Kaohsiung to Sydney in December.

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 Kaohsiung to Sydney in December from 466€

Return flights