Out of all the popular cities in Thailand, Bangkok is the cheapest city to hire a car in at just £16/day. Renting a car in Bangkok is 24% cheaper than renting one in Ubon Ratchathani where the per day rate is around £21. Other fairly inexpensive cities in Thailand to get a car hire in are: Phuket City (£16/day), Chiang Mai (£16/day), and Krabi (£16/day). While these cities typically have cheaper prices than the rest of the country, travellers looking to hire a car in Bangkok should expect to spend around £16/day on their transportation. The most popular city to rent a car in Thailand is Bangkok.