The suspected woman, who has been identified as Hani, was detained following the discovery at the Jakarta Airport, Sky News reported, citing the Indonesian Police as saying.
The 37-year-old woman was on an Etihad Airways flight from Abu Dhabi to Jakarta, but the flight was diverted to Bangkok.
The woman, who had worked as a domestic helper in Abu Dhabi for four years, secretly gave birth during a flight from Abu Dhabi to the Indonesian capital on Saturday, officers suspected.
Roughly four hours after take-off she began bleeding, forcing the captain to divert to Bangkok.
She was deplaned at Thailand and flew to Jakarta on a later flight.
The dead newborn was discovered after the flight arrived at its eventual destination, Jakarta. (ANI)