The airline with the best average rating is LAN Airlines with 7.7/10.
The average flight time is 2 hours and 20 minutes.More information
The lounge in Buenos Aires/Ezeiza have good wines but the food is not very good. If you flight this trip from Aeroparque/AEP (buenos Aires) to Santiago/SCL Lan dont have any lounge to wait your flight.
I Have several problems with LAN, they sell code-share tickets and if you request special services with the flight operated for the other airlines, they cant give you the confirmation of it. So, take care if you fly with Lan Airlines in a code share flights. I will never repeat this mistake ever.