14 hr 50 min is the shortest flight time from San Francisco to Buenos Aires.

The cheapest days to fly are usually in January. Typical prices range from $810 to $1,150.

The best round-trip deal recently found on Google Flights from San Francisco to Buenos Aires was with American from $818. The best one-way deal was with Avianca, COPA from $550.

There are no direct flights from San Francisco to Buenos Aires.

No airline flies direct from San Francisco to Buenos Aires.

The cheapest round-trip flight from San Francisco to Buenos Aires starts at $818 from Sun, Sep 8 to Mon, Sep 23. The cheapest one-way flight starts at $550 and departs on Wed, Sep 4.

Peak periods for visitors include the mild months of fall (Mar–May) and spring (Oct–Dec). Many locals leave the city during the hot, humid summer months of Jan–Feb for vacations, and businesses may be closed or have limited hours then. Winter (Jun–Aug) is chilly and rainy. The Tango Buenos Aires Festival (Aug) and El Día Nacional de Tango (Dec 11) celebrate the tango dancing and music with live performances and concerts.

It's easy to use Google Flights to find the cheapest days to fly from San Francisco to Buenos Aires.
Just click the Departure label near the top of the page to open the calendar. Choose a start date and a return date to see how the round-trip fare changes on those specific days.
Adjust the trip type to see one-way fares. The cheapest available flights are highlighted and easy to spot. Once you settle on dates, click the Search button to see flight options and book the deal.

You can also turn on price tracking to get alerts if the price changes for a route or flight.