The airline with the best average rating is SWISS with 7.7/10.
The average flight time is 7 hours and 13 minutes.More information
Overall a good airline but I did not like the black backseats as they made the cabin look very dark and seats looked a bit old fashioned and need to be modernized a bit. The legroom was average and could be better. The main food was not good but the breakfast was ok. Crew were nice and attentive though.
Boston airport's check in hall was very nice but the airside area looked very dated and old with not much to do. Zurich airport was very clean and very nice in every aspect.