Flying at high altitudes poses difficulties for commercial aircraft ... Flying at such heights also allows aircraft to soar ...

But just how high do planes fly? And why do they have to stay at a set altitude?  We reached out to Theodore Kyrazis, a ...

Pilots who once would have happily spent their careers flying private jets are instead getting pulled ... now only three quarters of a mile, with clouds hovering just 300 feet overhead.

Contrails, or condensation trails, are thin streaks of cloud ... above earth where there is less air traffic. However, like modern commercial aircraft creating more contrails compared to lower ...