The bus system in Thailand is well organized, cheap and efficient. In cities a bus ticket costs around 3.50 baht for a standard bus without air - conditioning on a journey of up to 8 kilometers. This is amazingly cheap if you think about it, but they do pack them in. Air - conditioned buses on inner - city bus routes cost up to 20 Baht per trip depending on the destination and type of bus, smaller air - conditioned buses being the most expensive. These prices are likely to go up soon as the price of oil goes up worldwide. However, comparing costs of public transport in places like London, you really are into a winner!