A female airline passenger was found dead in her seat after fellow travellers reportedly noticed she was not moving as passengers disembarked from the aircraft.

The 28-year-old woman was unresponsive when it was her turn to leave the plane after it landed in Chiapas, Mexico, early Wednesday morning, Mexican outlet Diario del Sur reported.

The four-hour Volaris flight, which departed from Tijuana, ran smoothly, and the shocking incident only came to light at the end, according to the outlet.

The young woman's body appeared to be removed from the plane and carried in what looked like a sheet, according to video shot inside the airport.

An autopsy is underway, but preliminary findings suggest her death was linked to a cardiorespiratory arrest.

The passenger had returned to Chiapas to see her family after working in the border city, according to the local outlet.