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

Return flights

01 Dec - 30 Dec	Scoot
02 Dec - 30 Dec	Scoot
06 Dec - 13 Dec	China Southern
06 Dec - 18 Dec	China Southern
07 Dec - 15 Dec	China Southern
05 Dec - 11 Dec	AirAsia X
22 Dec - 30 Dec	AirAsia X
29 Dec - 13 Jan	AirAsia X
22 Dec - 05 Jan	China Southern
19 Dec - 30 Dec	AirAsia X
19 Dec - 30 Jan	Scoot
29 Dec - 03 Jan	AirAsia X
22 Dec - 03 Jan	AirAsia X
21 Dec - 03 Jan	Scoot
19 Dec - 03 Jan	AirAsia X

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 $727

Return flights