AirHint found the following cheapest return flights from Delhi (DEL) to Penang (PEN) in September 2025 (see full year).

Return flights

22 Sep - 01 Oct	AirAsia X
22 Sep - 10 Oct	AirAsia X
22 Sep - 08 Oct	AirAsia X
22 Sep - 24 Sep	AirAsia X
22 Sep - 06 Oct	AirAsia X
22 Sep - 28 Sep	AirAsia X
24 Sep - 01 Oct	Thai AirAsia X
24 Sep - 10 Oct	Thai AirAsia X
24 Sep - 08 Oct	Thai AirAsia X
24 Sep - 06 Oct	Thai AirAsia X
24 Sep - 28 Sep	Thai AirAsia X
23 Sep - 30 Sep	Malaysia Airlines
22 Sep - 05 Oct	AirAsia X
20 Sep - 24 Sep	IndiGo
22 Sep - 30 Sep	Thai Airways
30 Sep - 05 Oct	Thai Airways

Also check the deals for one-way flights from Delhi to Penang 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 Penang in September from $290

Return flights