Ik heb dezelfde vraag eens op een ander forum gesteld, en dit is het antwoord dat ik kreeg :
Hello there... There's no Taxi for sure in Flores. But Public transport like buses are available everyday to move around from one place to another place. From 1 city to another city, you can go by bus (not really recommended unless you're an adventour freak). Me last time, some part I rent a car, others I went with what is so called 'travel' car... they have daily schedule from one town to another. And it's also cheap... like IDR 50,000 (8bugs). You can ask the hotel for the phone number, and the travel car will pick you up to the hotel and send you to your next hotel where you gonna stay. I know travel is available from Labuan Bajo to Ruteng, Ruteng to Bajawa, Bajawa to Ende, Ende to Maumere. So the whole nice area is pretty covered already. And when you stay in 1 place, you can rent a scooter that will cost you about IDR 50,000 a day. The people there is nice, so you can always ask them how to get around. Renting a car is quite expensive, it's about IDR 500,000 per day if you rent it at least for 3-4 days. If it's only 1 day, they gonna charge you more (unless you bargain). It usually comes with a driver already. Renting a boat daily is about IDR 350,000 if you want to visit an island like Rinca, etc... Hope this info help.