Low fare tickets from $454 to $484 round trip are available with American Airlines for San Francisco to Zurich, Switzerland for travel beginning August 2017 and dates into March 2018.
Many of the outbound itineraries fly Finnair SFO to Helsinki nonstop.
American Airlines San Francisco SFO – Helsinki HEL – Zurich ZRH – New York JFK – San Francisco SFO
$453.76 round trip Tue Sep 5 – Thu Sep 14
American Airlines San Francisco SFO – Helsinki HEL – Zurich ZRH – New York JFK – San Francisco SFO
$484.06 round trip Tue Aug 22 – Wed Aug 30