Are perfumes allowed in the airplane

Yes under 100ml

Caroline, You can find out what you are allowed to bring on the plane here, http://bit.ly/TSAWhatCanIBring.

You still have to do the pcr to travel to Argentina

There are two possibilities : - If you come outside with in your hand luggage it is allowed to Customs within 100 ml - If you can not buy at the airport after clearing customs. There you can take as much as you can.

if it is below 100ml you can take in carry on bag.

If you can, but you should put it in a ziplok type case and it should also not exeder 100ml