Can i use my foreign passport after taking the oath?

I don't know where is the doubt about the airline checking what your status was in the country. If someone doubts it and has dual citizenship, please try to board the plane with the foreign passport and see if they let you in without showing what your status was in the US. Even if the foreign passport lets you go to the destination.

As a test, I used my foreign passport last week when leaving the US (online airline checking process). I was never asked what my status is in the US by the airline. As I suspected, it was Canadian immigration that asked what my status was in US, to which I simply answered "I'am a citizen". On my return I used my US passport for first time with no hassles whatsover. CBP officer was friendly and even commented on how the quality of some food is higher in Canada (I had declared some cheeses I had bought in Canada).
 
The general rule of thumb is that you show the airline the passport you are using to enter the country you are going to. If you are travelling from a country with exit controls, this could means lots of passport switching. For example if you are a dual citizen of A and B and you are travelling from A to B, you should show passport B at check in, then passport A at the exit control, and then passport B when you board the plane and after you land in country B.

When leaving the US, the airline is required to collect the I-94 or I-94W and turn it in to USCIS. So it is not uncommon to be asked whether you have a green card if you are checking in for an international flight leaving the US and the airline check-in agent does not see an I-94 form in your foreign passport. So this adds one little twist. I suppose it is fine to tell then you are a US citizen as well - their only job is to collect the I-94 form and make sure you have valid documentation to enter your country of destination.

To simplify matters: If the country you are going to does not require US citizens to get a visa (and you meet other criteria like holding a round-trip ticket), you should be able to get away with using your US passport until you land and clear immigration in the other country.
 
The general rule of thumb is that you show the airline the passport you are using to enter the country you are going to. If you are travelling from a country with exit controls, this could means lots of passport switching. For example if you are a dual citizen of A and B and you are travelling from A to B, you should show passport B at check in, then passport A at the exit control, and then passport B when you board the plane and after you land in country B.

When leaving the US, the airline is required to collect the I-94 or I-94W and turn it in to USCIS. So it is not uncommon to be asked whether you have a green card if you are checking in for an international flight leaving the US and the airline check-in agent does not see an I-94 form in your foreign passport. So this adds one little twist. I suppose it is fine to tell then you are a US citizen as well - their only job is to collect the I-94 form and make sure you have valid documentation to enter your country of destination.

To simplify matters: If the country you are going to does not require US citizens to get a visa (and you meet other criteria like holding a round-trip ticket), you should be able to get away with using your US passport until you land and clear immigration in the other country.

exactly!....
 
Which takes care of nearly 85% of the countries around the world.

If the country you are going to does not require US citizens to get a visa (and you meet other criteria like holding a round-trip ticket), you should be able to get away with using your US passport until you land and clear immigration in the other country.
 
Which takes care of nearly 85% of the countries around the world.

But not in reverse. If you are a dual citizen coming back to the US, the airline will want to see a US visa. Even if you hold a passport from a visa-waiver country, the airline will probably want to see an ESTA travel authorization plus confirmed return/onward reservations. So if the other country has exit controls, you will still need to do the whole passport-switching thing.
 
Top