The airline with the best average rating is LAN Airlines with 7.7/10.
The average flight time is 1 hours and 53 minutes.More information
The Boeing 789 is amazing plane. The crew let me take a picture in the cock pit and a detail is, to cover this route (SCL MAD) flight 3 pilots, and they 3 was really kind with me there. The J Class is spacious, the seat is confortable and the IFE is really good but the food service was poor for 2 hours flight.
I had problems with Lan, with a code share flight so i will not take again a flight with they. To flight this route KLM is offering a new Business Class cabin and the service looks pretty better. Even Air Canada with the B77W.
And remember, Lan offer special services in Code Share flights in the website but when you need to take one they say cant do it because the flight (in code share) is operated with other company so you have to call to they. The other company say the same so, you cant use special services.