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pay attention to passports need visa for some countries
No, only an authorization, called ESTA. You make the request on the Net: www.esta.cbp.dhs.gov/esta/, also a document with the address of our house and a little liquidity can be asked to the PAF of LAX. We advise you to have your ESTA beforehand, to buy your plane ticket. The price of a ticket will vary between 350 to 950 € depending on the company, the anticipation of the date and the different options.
Please be informed that certain nationalities will need visas to enter the United States.