"Basically we keep below 10,000ft because any higher than that you require oxygen."
Mr Richards said one of the places they would be navigating through was the Rocky Mountain Ranges in Colorado, with peaks reaching more than 3000m.
The 49-year-old, who lives in Auckland with his wife, Vicki, started building the two-seater aircraft in 1994.
"It all started in a garage out in West Auckland ... and I just enjoy making things."
The plane's wooden airframe was imported from Canada for the project.
"It [the Falco aircraft] was designed in 1955 in Italy ... but because wood is so labour intensive to build they stopped making them," Mr Richards said.
The yellow plane made its maiden flight in 2002 in Auckland.
Since then, it has been flown throughout New Zealand, but has yet to soar above foreign shores.
Mr Richards has already shipped his aeroplane to America, and will soon travel over to prepare it for the trip.
"At the moment it's sitting in a container in Los Angeles," he said. "I've had to pull it apart, measure it and put it in a container."