Meeting with US transport secretary Pete Buttigieg on a visit to the US, the pair will discuss how to work together on reducing aviation emissions and share knowledge to accelerate the development of sustainable aviation fuel (SAF).
Harper said: "While an ocean separates us, we’ve never been more aligned with the US on the future of aviation and what that entails – whether it’s boosting jobs, opening new trade opportunities or delivering guilt-free air travel.
"This trip is a crucial part of our work to reduce emissions from aviation alongside the US, Canada and Singapore, and I look forward to meeting my counterparts and industry representatives."
During his visit, Harper will co-chair the SAF Investor Summit in Detroit with his US and Canadian counterparts.
The summit will act as a "springboard" for discussions on how to overcome future barriers the international sector may face, such as the widespread sourcing of materials to produce next-generation fuels, as well as the investment needed to help deliver that vision.
The UK and the US governments will examine how to get SAF plants working at scale and promote the fuel as a solution to tackling climate change and creating jobs and skills for future generations.