Closest I can recall is Arthur C. Clarke's "3001: The Final Odyssey". People strapped on wings, flapped their arms, and that was enough to fly. Alternatively,

Closest I can recall is Arthur C. Clarke's "3001: The Final Odyssey". People strapped on wings, flapped their arms, and that was enough to fly. Alternatively, in "Rendesvousz With Rama", he envisioned a human-powered flying bike. IIRC, a foldable sports bike with wings and a propeller.