Backed by Bill Gates and Amazon, clean aviation startup ZeroAvia promised a hydrogen-powered future. Now, a massive U.S. retreat and executive shakeup reveal why.

New Kazakhstan operator Qazaq Air could inaugurate operations as early as this week after gaining tentative approval from the country’s aviation regulator to begin domestic operations in the Central ...

Alaska said Tuesday it will donate one of its retired Q400 turboprops as a development project to ZeroAvia, a U.K-based startup that aims to integrate hydrogen fuel cells with electric motors to power ...