There is not enough information to answer -fly to the US from where?
Yes, as long as you are using the same company.
No you do not need a passport to travel from the us to puerto rico. you do need a visa.
As of June 1st, 2009, you need a passport to travel from Canada to the US.
You need at least 3 months left from the time that you depart for US. But many countries need at least 6 months left of passport validity for international travel.
No. but to travel out or into the country they do.
I believe you can use it as soon as you receive it in the mail.
You need a passport if you are going to travel outside of the country.
Yes of course. You will going to need a travel allowance.
no
May be Afghanistan is the only friend country for USA, in which US citizens need Visa to travel.
If you are a US citizen, you will need both a valid US passport and an Australian ETA visa to travel to Australia.
There is only 49 travel agents in the US