Thailand's Department of Civil Aviation (DCA) has taken notice of the issue, and is now reportedly discussing the matter with local aviation agencies and airlines to formulate a policy that complies with security regulations.
CNN approached several other Thai airlines for comment on the issue.
"We treat the dolls like any other dolls," said Patee Sarasin, CEO of low-cost airline Nok Air.
"The customers can put the dolls on their lap while flying. If they want to buy a seat, it is the most expensive price possible. Therefore, we do not encourage customers to buy seats for the dolls, but we cannot stop them from buying another seat if they wish to do so."
AirAsia, meanwhile, said it has no policy in place regarding Luk Thep dolls.