Cheap flights from San Francisco to Buenos Aires from $481

The cheapest month to fly to Buenos Aires from San Francisco is in January. Flight prices, which tend to average around $1,091, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Buenos Aires from San Francisco during September instead. Flights to Buenos Aires in September, while not as cheap as those in January, still average around $1,142.

You are more likely to see cheaper flights to Buenos Aires from San Francisco when booking weeks ahead of your departure date. In general, you can expect to find flights to Buenos Aires for around $1,260 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Buenos Aires from San Francisco for as low as $983 on momondo.

You could potentially save up to 2% on your flight if you consider stops on a San Francisco to Buenos Aires flight.

As of November 2026, prices for San Francisco to Buenos Aires flights are approximately 12% more expensive when compared to flights at the same time last year.

LATAM Airlines, Copa Airlines, and United Airlines are the most popular carriers operating from San Francisco to Buenos Aires

United Airlines, American Airlines and Copa Airlines are the top three most popular airlines that fly to Buenos Aires from San Francisco according to our data. United Airlines is the first choice among our users, with 38% of people opting to fly with this airline when traveling to Buenos Aires. Keep in mind that there are 7 different airlines that fly to Buenos Aires on a routine basis, so you have a few additional options to choose from.

Houston (IAH) was the most common stop: 51% of momondo users choosing 1-stop flights on this route connected there.

Flights via New York (JFK) offer the lowest average round-trip price of $1,036.

Flights connecting via Dallas (DFW) have the shortest average one-way travel time: 15h 27m.

Miami (MIA) has the shortest average layover time for this route: 1h 33m.