Beginning October 1, foreigners can enter if they have previously registered their completed COVID shot regimen at mevacuno.cl along with a 72 hour PCR negative test, c19.cl declaration and proof of insurance. For the insurance, ask the company that you need a policy that specifically conforms to Chile's foreign visitor COVID requirements.
On arrival, you will probably receive another PCR test and must quarantine for 5 days within 2 hour distance max from the airport. Only private transportation (airport official taxis are included) can be taken to this home or hotel and one cannot leave it for any reason or receive visitors so the logistics of groceries and meals must be planned in advance (remember most local online delivery services do not work with foreign cards).
After the quarantine, assuming the PCR test was again negative and no other symptoms developed, you can travel to most anywhere as nearly the entire country has advanced out of quarantine and semi-quarantine with a c19.cl declaration for internal travel when traveling between regions. If different comunas fallback into quarantine restrictions, the travel logistics can become complicated.
The authorities will track and communicate with you during the 14 days upon entry and you must answer any communication and take any requested test during that time.
Fines for breaking the rules can run up to CLP 30 million.