Seven paragliders took off from the remote Emmdale Airstrip on Saturday, about 100 kilometres east of Wilcannia in New South Wales’ remote north west.
Only six have returned.
Police are now appealing for public assistance to find missing French national Peire Naville.
The alarm was raised when the 67-year-old did not land with the other pilots on the Cobb Highway, about 60 kilometres south of Ivanhoe.
Police say they have raised the alarm because of the hot weather in the state’s west.
“Officers from Barrier Police District were notified and have commenced an investigation,” police said in a statement released overnight.
“Police hold concerns for Peire’s welfare due to the hot weather conditions.”