iI want to share a cheaper way from Polonia airport by taxi.
The alternative to taking the more expensive and more run down official airport taxis is to walk out of the airport through its main gate. Across the roundabout you will notice a Pertamina gasoline station. Right in front of the adjacent KFC you will find the very reliable Bkuebird taxis.
There is a Bluebird taxi dispatcher who will handout number in case there is a line of people waiting. For this service they charge 5,000 Rupiahs. The taxis will all use their meters and it will come out way cheaper this way.
Do not get lured into the airport taxis by the many hecklers waiting at the arrival exit. You will most certainly be riooed off.