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

Return flights

01 Dec - 08 Dec	VietJet Air
03 Dec - 29 Dec	Batik Air Malaysia
03 Dec - 04 Dec	VietJet Air
03 Dec - 09 Dec	VietJet Air
14 Dec - 15 Dec	AirAsia X
03 Dec - 11 Dec	VietJet Air
01 Dec - 04 Dec	VietJet Air
01 Dec - 03 Dec	VietJet Air
03 Dec - 07 Dec	VietJet Air
03 Dec - 05 Dec	VietJet Air
08 Dec - 26 Jan	Batik Air Malaysia
08 Dec - 08 Jan	Batik Air Malaysia
31 Dec - 22 Jan	AirAsia X
28 Dec - 20 Jan	AirAsia X
18 Dec - 11 Jan	Hainan Airlines
14 Dec - 01 Jan	AirAsia X
07 Dec - 19 Jan	AirAsia X
23 Dec - 22 Jan	Hainan Airlines
13 Dec - 01 Jan	AirAsia X
08 Dec - 12 Jan	Batik Air Malaysia

Also check the deals for one-way flights from Sydney to Delhi 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 Delhi in December from $709

Return flights