(richmond, va )
I am going to be in Paris Sept 1-8. Can I call the US from my Galaxy Luna phone?
No, sorry your Tracfone does not work outside the US. With that phone, your best bet is to connect to WiFi there and use something like WhatsApp or Viber to make your international calls.
As far as I know, only the major carriers such as AT&T, T-Mobile offer international roaming with some of their plans.