The 10 Busiest Airports in the United States. Hopper has compiled a list of the United States' 10 busiest airports based on passenger traffic.
Fly from Sydney to Hong Kong on a Qantas Airbus A380 and you'll find the 180-degree fully flat beds, but a Qantas Boeing 747 on the same route has angled lie-flat beds. To make things worse, both Qantas products are called Skybeds â- but only the A380's second-generation Skybed is a fully-flat seat.
Theyâre comfortable to sit in for shorter-haul flights, according to customers, but not comfortable to sleep in. 2) Lie-flat Seat: Despite its name, this seat does not actually lie flat. The back and legrest/footrest recline at a slight angle. Some can recline as much as 172 degrees.