The airline with the best average grade is China Southern with 7.4/10.
The average flight time is 10 hours and 36 minutes.More informations
Their seats are a major complaint for me.,. there is no "wing" on the seat to allow you to sleep properly.
There was a mere 10cm extra leg room. The seat was just as narrow as that of economy class, reclining only about 10 degrees ... All other appointments and facilities were as for Economy.
Their entertainment system is really bad - the screen is like 3m away from your seat and the choices of movies are few and lousy. Food - you get the same choice as those flying Economy - extremely bad