Travelling by bus from Kuala Lumpur to Singapore is an interesting way to explore mainland Malaysia and travel to the fascinating destination of Singapore. The travel time between the two destinations is approximately 6 hours. Various bus services in different price ranges operate round the clock between these two popular destinations. I have travelled on these luxury buses a couple of times and found it to be a better option than catching a flight from Kuala Lumpur. The bus to Singapore can be booked from Penang, Kuala Lumpur and Johor Bharu.