One World Airlines such as American, British Airways, Finnair, Iberia have round trip airfares travelling from San Francisco (SFO) to Munich Germany (MUC) for $492-$510, making 1 or 2 stops. Price and stops will depend on what you choose for a flight.
Departs SFO: Oct 28 thru Dec 11, 2018
Returns: good availability returns, generally a 7 day stay works
Use dates and plug it in Expedia [expedia.com]
to see what choices come up for you. See sample insert.
HT: The Flight Deal