Upgrading and downgrading: air passengers’ rights
If passengers are upgraded (e.g. economy class [udesign_icon_font name=”fa fa-arrow-right” color=”#dd3333″ size=”1em”] business class), the airline company cannot request any supplementary payment. If, on the contrary, passengers are downgraded (e.g. business class [udesign_icon_font name=”fa fa-arrow-right” color=”#dd3333″ size=”1em”] economy