Generally how high and how fast do airplanes travel?
A typical commercial aircraft will travel at around 35,000 feet and will be moving at an airspeed of roughly 500-550 miles per hour, depending on the plane.
Why do you not experience a drop in air pressure when you travel via airplanes even though airplanes travel at high altitudes?
Probably ... depending on where the cockpit is. The cockpit of boats (of a certain type) are generally photographable. Cockpits of common airplanes are generally photographable. Cockpits of high-performance military planes are generally not photographable, as the cockpit's instruments and controls are classified as secret.