Depending on the time of year, there are around 10 daily direct flights from the U.S. to Buenos Aires. The major gateways to Argentina depart from New York City, Miami, Atlanta, Dallas and Houston. Most flights are overnight and take anywhere from 8 – 11 hours depending on your departing city.
Here are the airlines that currently offer direct flights to Buenos Aires
Another possiblity when trying to find the cheapest fare is to try and connect through other cities in Latin America. Here is a list of airlines that offer direct routes between
Latin America and Buenos Aires: