passport question?

Question

when traveling abroad, i have to use my US passport when leaving the US. my question is may i use my irish passport upon arrival. so i go through a dirrerent costoms line, or do i have to use the US passport when i land because i took off using it?

Answer 1

Well techincally I would use my US passport because since you are a US citizen you aren't an alien and you don't want to make your cuztoms experiance any more complicated then usual.

Answer 2

In America
When leaving or returning to the United States always present yourself as a US citizen (show your US passport and declare yourself to be a US citizen). When inside the United States and dealing with the local police or any other local, state or federal official, if a question comes up about your citizenship, tell them you’re an American. It’s that simple. Don’t mention your dual citizenship or that you are a citizen of another country unless specifically asked. Ninety-nine percent of the time the police and government officials don’t care because in the eyes of US law you are an American first and foremost and subject to our laws.
When you travel between the two countries carry both passports. US law and the laws of countries that allow dual citizenship allow you to carry more than one passport.

As mentioned previously when entering or leaving the United States use your US passport. When entering or leaving your native country, use your native country’s passport.

# When traveling by air, the same principles apply, but dealing with the airlines may be confusing. The airlines are interested in what passport you will use at your destination. So before your flight begins, the airlines will ask for your passport so they can verify that you can legally enter the country at your destination. Your passport information will be entered into their computer system and will become part of the flight manifest. So make sure you show the airlines, the passport you will use at each of your destinations. #
there you go :
http://www.newcitizen.us/dual.html
:-)

For example, let’s say you are dual citizen of both the United States and Great Britain. You live in New York and you are traveling to London. In New York, when you check in for your flight to London, you would show the airline your British passport. You will be entering Great Britain as a British citizen so the British passport is the passport the airline wants to see. When you are in London and checking in for your return flight to New York, you would show the airline your U.S. passport. You will be entering United States as an American citizen so the U.S. passport is the passport the airline wants to see. Keep in mind, while you are in the airport, if you are asked by government officials about your citizenship, if in the U.S., be an American and show them your U.S. passport. In the airport of your native country, be a citizen of that country and show them your passport for that country.

Some airlines may ask you upfront, when you check in for the first time, how you are going to enter each country on both the outgoing flight and the return flight. In this case, you would show them both your passports. Also, be prepared when you first book your flights to discuss the dual passport issue with the airline’s reservation agent.

your reservation is likely to have been done with ONE passport :
http://www.newcitizen.us/dual.html

Answer 3

They might notice you didn't seem to enter the country if it's not in the book. They probably will, unless you're talking about starting in europe, where they see you as legit.

Answer 4

Yes you have to use your USA passport.

Answer 5

Use both just in case.