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

Return flights

24 Dec - 05 Jan	Scoot Tigerair
21 Dec - 06 Jan	Scoot Tigerair
13 Dec - 04 Jan	Scoot Tigerair
23 Dec - 14 Jan	Scoot Tigerair
23 Dec - 05 Jan	China Southern
17 Dec - 09 Jan	Scoot Tigerair
17 Dec - 06 Jan	AirAsia X
15 Dec - 03 Jan	AirAsia X
17 Dec - 03 Jan	AirAsia X
22 Dec - 05 Jan	Singapore Airlines

Also check the deals for one-way flights from Sydney to Vientiane 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 Sydney to Vientiane in December from 866€

Return flights