AirHint found the following cheapest one-way flights from Bangkok (BKK) to Penang (PEN) in September 2025 (see full year).

One-Way flights

30 Sep	Thai AirAsia	direct
05 Sep	Thai AirAsia	direct
25 Sep	Thai AirAsia	direct
13 Sep	Thai AirAsia	direct
14 Sep	Thai AirAsia	direct
24 Sep	Thai AirAsia	direct
06 Sep	Thai AirAsia	direct
10 Sep	Thai AirAsia	direct
02 Sep	Thai AirAsia	direct
08 Sep	Thai AirAsia	direct

Also check the deals for return flights from Bangkok 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 one-way flights from Bangkok to Penang in September from $51

One-Way flights