Because that's more efficient.
Most aircraft do not travel in the stratosphere. Some military and passenger jets fly in the stratosphere, but most aircraft fly in the troposphere, below the stratosphere.
the stratosphere
Airplanes travel through the stratosphere and the ozone layer is between the mesosphere ans stratosphere!!!!
The stratosphere
Type your answer here... airplanes fly in the stratosphere to avoid weather problems
Stratosphere
yes
stratosphere
Yes, airplanes do fly in the stratosphere to get above most bad weather. (Note: Nobody would want to ride in a storm and getting freaked out!)
Example: Airplanes Ozone layer- The other term for "Stratosphere"
Stratosphere
stratosphere