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

One-Way flights

24 Sep	Thai Lion Air	direct
25 Sep	Thai Lion Air	direct
27 Sep	Indonesia AirAsia	direct
26 Sep	Indonesia AirAsia	direct
23 Sep	Indonesia AirAsia	direct
30 Sep	Indonesia AirAsia	direct
19 Sep	Thai Lion Air	direct
28 Sep	Indonesia AirAsia	direct
18 Sep	Thai Lion Air	direct
20 Sep	Thai Lion Air	direct

Also check the deals for return flights from Bangkok to Jakarta 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 Jakarta in September from $58

One-Way flights