Singapore Airport Budget Terminal Transfer
Note: The Budget Terminal is scheduled to close on 25 September 2012. Airlines using the terminal will be moved to Terminal 2 while a new Budget Terminal is built, expected to be completed in 2017.
From the Budget Terminal, your only real options are to take a taxi from the queue at the terminal, or take the free shuttle bus to Terminal 2 to take advantage of the other airport transport options.
A taxi to the city center will cost you around S$ 18 (14.80 USD) to S$ 30 (24.67 USD) including airport surcharges.
Although transfers are quick and easy at the airport, if you're arriving at an odd hour or in a small group, you may wish to book a transfer in advance: