Andean condor can fly for 100 miles without flapping wings
Paraglider and hang glider pilots can also soar for hundreds of miles without power or flapping. Soaring birds like condors, turkey vultures, hawks, etc. use the same technique of turning in tight circles in rising air to increase altitude. Once cloud base is reached and the rising air stops, they glide significant distances to the next hillside with rising air. Whenever you see birds in the sky circling around the same spot together, it's because they're in rising air and using it to stay aloft.