Denver is lobbying Air New Zealand to start direct flights to the "mile-high city" with new extended range aircraft.
Representatives from Colorado tourism and Denver International Airport have been in the country this week and met the airline and the travel industry.
Denver International Airport vice president of air service development and aviation research Laura Jackson met Air New Zealand's commercial network planning team to present a business case for the route.
"They're intrigued by the opportunity in Denver, they're with the Star Alliance so they know about the strength of the Denver hub. Modern planes, open up new routes that would have been impossible in the past," she said.
Air New Zealand flies directly to Los Angeles and San Francisco and has been looking at new opportunities in the United States.