Gabby Petito's parents to be reunited with daughter's remains

The parents of US woman Gabby Petito have reportedly flown to Wyoming to collect her remains after an autopsy determined she was strangled to death.

Ms Petito, 22, died three to four weeks before her body was found on September 19 near an undeveloped camping area along the border of Grand Teton National Park in remote northern Wyoming, Teton County Coroner Dr Brent Blue said in a news conference yesterday.

It wasn't clear if the determination might lead to additional charges against Ms Petito's boyfriend and travelling partner, Brian Laundrie, who is considered a person of interest in her disappearance and remains unaccounted for.

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The Independent has reported that Ms Petito's parents have departed for Wyoming, with her father Joseph to pick up Ms Petito's remains.

Her body has been turned over to a mortuary for cremation.

Ms Petito had been on a cross-country trip with her boyfriend.

READ MORE: US woman Gabby Petito was strangled, coroner says

She was reported missing on September 11 by her parents after she did not respond to calls and texts for several days while the couple visited parks in the West.

Ms Petito and Mr Laundrie posted online about their trip in a white Ford Transit van converted into a camper.

They got into a physical altercation on August 12 in Moab, Utah, that led to a police stop, which ended with police deciding to separate the quarrelling couple for the night.

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No charges were filed, and no serious injuries were reported.

Investigators have searched for Mr Laundrie in Florida and also searched his parents' home in North Port, about 56 kilometres south of Sarasota.

Federal officials in Wyoming last month charged Mr Laundrie with unauthorised use of a debit card, alleging he used a Capital One Bank card and someone's personal identification number to make unauthorised withdrawals or charges worth more than $1360 ($US1000) during the period in which Ms Petito went missing.