Demafelis was the domestic helper whose body was found in a freezer last February 9, a year after she went missing.
One domestic worker named Marissa Dalot, 40, who left Kuwait after working there for five years, said she was beaten by her employer's mother regularly but still chose to stay, reported.
CEB has previously announced that it would shoulder the cost of the entire charter flight, offering the airlift for free, in response to the call for assistance by the government to repatriate Filipino workers in Kuwait.
The government said the ban would continue to be imposed until Kuwait agrees to sign a bilateral agreement with the Philippines that would ensure greater protection for migrant Filipino workers there.
Duterte talked with the family of Demafelis and then briefly viewed her remains, gently touching her coffin with his hand.
"Karma na "yan (karma will catch up with them)", Duterte said of the suspects in Demafelis" death during his conversation with her parents.
"We should stop the deployment of domestic workers since they comprised 80 percent of the problems facing OFWs, especially since some of them are being held against their will by their employers or being abused sexually".
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Many desperate Filipinos have also chosen to stay in countries where the Philippines has banned Filipinos in the past, such as in war-torn Iraq and Syria.
"Ito ba 'yung kabayaran ng pinakita namin sa inyo?" That prompted senators to ask why labour officials did not immediately order a ban on the deployment of workers to Kuwait with the spike in deaths.
"The Philippine government will actively espouse the right of the family of Joanna to obtain justice".
Leading Philippine carrier Cebu Pacific (PSE: CEB) provided airlift support for 396 Overseas Filipino Workers (OFWs) who were repatriated from Kuwait.
Duterte said the government is conducting an assessment to "find out the places where we deploy Filipinos and our countrymen suffer brutal treatment and human degradation". Duterte has criticized Kuwait over other Filipino killings and abuse there.
Manila has said some Filipino workers have been raped, fed scraps and forced to work 21 hour days by their employers in Kuwait.