It is certainly possible to take a taxi from the airport to Alam Sari. It takes about an hour and a quarter to reach Ubud and then another 15 minutes to reach Alam Sari in Keliki. If the driver does not know the precise location it is best to call the front desk +62361 981 420. We are also happy to arrange an airport pickup for you. Feel free to contact the front desk to arrange. Many thanks for your question.