Slipstream (1989)

In the future, natural disasters (earthquakes, floods) have ravaged Earth, leaving a world where pockets of communities live within canyons while a violent wind known as the "slipsteam" is the only means of transport, via airplanes. Matt Owens is a nomadic adventurer who kidnaps a prisoner ("Byron") of two violent law officers so he can claim the bounty for himself. Traveling across the wind swept landscape, Matt and Byron are relentlessly pursued by the officers, and Matt finds Byron isn't what he appears to be, as they travel from community to community and encounter pockets of strange societies that live beyond the slipstream.