Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Bandung to Bangkok as you normally would.
Bandung Husein Sastranegara (BDO) is the airport you will fly out of if you book a flight from Bandung to Bangkok. You should not have trouble finding flights to Bangkok from Husein Sastranegara; the airport handles an average of 0 outbound flights to Bangkok per day. You should also have plenty of airline options to choose from since 0 airlines have flights from the Bandung airport to Bangkok. It is only a 4.4 km journey to Husein Sastranegara (BDO) from Bandung’s city centre.
This is defined as Bandung Husein Sastranegara Airport (BDO) and Bangkok Suvarnabhumi Airport (BKK). Codes like Bangkok Suvarnabhumi Airport are often used to just call airports uniquely. Bangkok Don Mueang Intl Airport (DMK), Rayong Utapao Rayong Pattaya Airport (UTP), Hua Hin Airport (HHQ) are other airports near this flight route and their unique identifiers/IATA codes.