AirHint found the following cheapest return flights from Delhi (DEL) to Sydney (SYD) in September 2026 (see full year).

Return flights

01 Sep - 10 Sep	Singapore Airlines
01 Sep - 29 Sep	Singapore Airlines
06 Sep - 10 Sep	Singapore Airlines
15 Sep - 30 Sep	VietJet Air
23 Sep - 23 Oct	AirAsia X
01 Sep - 10 Sep	Air India	direct
15 Sep - 30 Sep	Air India	direct
01 Sep - 29 Sep	Air India	direct
23 Sep - 23 Oct	Air India	direct
06 Sep - 10 Sep	Air India	direct

Also check the deals for one-way flights from Delhi to Sydney in September.

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 Delhi to Sydney in September from $600

Return flights