How can I speak to Someone at Singapore Airlines? How can I speak to Someone at Singapore Airlines? Call directly at Singapore airline customer service OTA number +1-877-335-8488 or the US number 0065- 6407-5332. #Singaporeairlinephonenumber For more info: https://groups.google.com/g/ibm.software.network.directory-integrator/c/IOn1sGippQg