This will depend on a number of factors. Depending on what country you are from and the country you are in there may be rules and regulations that require a passport.
If you are traveling in a foreign country often times it is necessary to show your passport for identification for a wide variety of transactions. It is a good practice to keep it with you at all times.
This being said it will all depend on what you are trying to do and especially what country you are in. Check the travel restrictions for the country you will be traveling to in advance to prevent problems.
Your passport is a type of proof of your citizenship and identification so it is a valid and important travel document. However, if you are looking to travel in domestic areas, your green card will suffice. If not, any government issued identification card. However, if you will fly, they might be needing your passport when at the airport.
Not to leave the USA. But you need one to enter it again or to enter into any other country you go to. It is best to have a valid passport before you leave the USA.
Passport is not necessary, but any one id proof(Original) is necessary. If you are domestic travel in abroad, that time passport is necessary.
Definately if you're travelling by plane but sometimes if you're travelling via boat or ferry.
Yes,you do
not necessary but recommended
Passports are usually just for international travel and are not necessary for domestic travel. You may need some kind of ID while traveling within a country.
No, domestic travels inside the US do not require you to show a valid passport. Any piece of photo ID is accepted. Updating with more current information. Yes you now need a Canadian passport to travel to the US.
No, passport requirements are not for domestic travels. Though passports can be used as a picture ID for boarding the plane.
a passport is not yet necessary to travel between the US and Canada, although it is desired. If you haven't gotten a passport yet, at the least bring your child's birth certificate.
Passport is a requisit.
No you do not need a passport to travel from the us to puerto rico. you do need a visa.
If that travel document is a passport then yes you can. Without passport it wont be possible
No if she has a passport she could travel anywhere without a USA passport
Yes any passport will do.
No. but to travel out or into the country they do.
The right to travel with a US passport is one benefit of being a citizen of the US. US citizens need a passport to travel to other countries.