Singapore Airlines landed on top with an 87.46% overall score — that’s mostly due to its luxury business class seating that converts into flat beds with a 9.5-inch width, the experts explained.

Travelers hate angled business-class beds because they slide down. Airlines have been slow to upgrade to fully flat. Some have all planes with horizontal beds; others advertise them, but only have ...

After that, every single Singapore Airlines flight will have business class seats that convert to fully lie-flat beds, ...