Less than 24 hours in Chile, I already am noticing how different the Chilean dialect is. So for the linguists in the room, hopefully you will enjoy this post! The most common feature I have heard so far is the deletion of the final [s] which is made by the letters s and z (sometimes c). In Spanish, as in English, "S" can mark plurals and a verb's subject. However, this doesn't seem to make a difference for the Chileans. Regardless of the sound's function and orthography, it seems to be omitted.
"Standard" Spanish: Diez mil [dies mil]
Chilean pronunciation: [die mil]
English: ten thousand (10,000)
"Standard" Spanish: los coches [los kotʃes]
Chilean pronunciation: [lo kotʃe]
English: the cars
"Standard" Spanish: ¿qué vas a hacer tú? [ke βas aseɹ tu]
Chilean pronunciation: [ke va ase ɹ tu]
English: What are you (informal singular) going to do? What are you (informal singular) about to do?
"Standard" Spanish: Muchas gracias [mutʃas gɾasias]
Chilean pronunciation: [mutʃa gɾasia]
English: Thank you very much, many thanks