Cheap flights from Paris to SAN FRANCISCO for €271 round-trip! Get cheap flights to the USA from France and book your tickets at the best price! Flights cost only from €271 both ways. San Francisco, officially the City and County of San Francisco, is the cultural, commercial, and financial centre of Northern California and the only consolidated city-county in California. San Francisco encompasses a land area of about 121 km2 on the northern end of the San Francisco Peninsula.