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

One-Way flights

06 Sep	Thai VietJet Air	direct
02 Sep	Thai VietJet Air	direct
10 Sep	Thai VietJet Air	direct
14 Sep	Thai VietJet Air	direct
09 Sep	Thai VietJet Air	direct
21 Sep	Thai VietJet Air	direct
30 Sep	Thai VietJet Air	direct
17 Sep	Thai VietJet Air	direct
07 Sep	Thai VietJet Air	direct
15 Sep	Thai VietJet Air	direct

Also check the deals for return flights from Phnom-penh to Bangkok 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 Phnom-penh to Bangkok in September from 40€

One-Way flights