Reply To: What is the issur in flying on shabbos

As long as you stayed with the tehum (roughly a kilometer) it would probably be okay as long as you don’t use any sort of engine (assuming you could manage to grow powerful wings, but that might raise the problem of mixed breeding with other species). The major problem is that Ha-Shem created gravity, and gave us relative heavy bodies, and those whose bodies are designed for flight have very small brains. This might be a shailoh if Yidden ever manage to get into space or on other planets.