Why do planes fly at high altitude even across the oceans, when flying at lower altitudes require covering a shorter distance?

Question

Why do planes fly at high altitude even across the oceans, when flying at lower altitudes require covering a shorter distance?

In: Engineering

Answer 1

Would you like to explain how you arrived at the conclusion that flying at lower altitudes requires covering a shorter distance?

Maybe when you can self-refute that idea, then you’ll understand the explanation for your question.