Otto Aerospace’s new business jet has no traditional passenger windows and a tear-drop-shaped cabin. Private-jet company Flexjet wants hundreds of them.

You may already know the real reason flight attendants greet you when you come on board, or what’s actually going on when you’re barred from returning to the plane when you’ve left something behind.

A cracked window forced a Southwest Airlines plane heading from Chicago to New Jersey to land in Cleveland on Wednesday, two weeks after a jet engine blew apart and broke a window in a deadly accident ...