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

Return flights

03 Dec - 10 Dec	Scoot
05 Dec - 13 Dec	Jetstar
04 Dec - 12 Dec	Batik Air Malaysia
01 Dec - 15 Dec	Scoot
07 Dec - 14 Dec	Scoot
02 Dec - 15 Dec	Batik Air Malaysia
07 Dec - 12 Dec	AirAsia X
02 Dec - 08 Dec	AirAsia X
07 Dec - 17 Dec	AirAsia X
01 Dec - 31 Dec	AirAsia X
20 Dec - 05 Jan	Xiamen Airlines
25 Dec - 20 Jan	Jetstar
20 Dec - 03 Jan	Xiamen Airlines
07 Dec - 05 Jan	AirAsia X
01 Dec - 01 Jan	Thai Airways
16 Dec - 13 Jan	AirAsia X
28 Dec - 18 Jan	AirAsia X
07 Dec - 01 Jan	Thai Airways
02 Dec - 26 Jan	Etihad Airways
12 Dec - 23 Jan	AirAsia X

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 544€

Return flights