There are more low economy fares to Europe today. One fare alert deal I see is San Francisco to Zurich on American Airlines at $414 round trip with wide open departures from September through April 2017. This fare can also be booked as a quick 2-day or 3-day turnaround with Sunday return. Late December/early January dates are excluded from low fare deal.
Also see this deal from Denver DEN at $442 round trip. Update: this fare is available from most United hubs to Zurich and Frankfurt.
American Airlines San Francisco SFO – New York JFK – Zurich, Switzerland ZRH
$414.06 Wed Nov 9 – Thu Nov 17
SFO-JFK-ZRH-JFK-SFO = 13,034 flight miles.
Availability for this fare is wide open.
Google Flights SFO-ZRH September-October fare calendar
American Airlines Denver DEN – London LHR – Zurich, Switzerland ZRH – JFK-MIA-SFO
$442.16 Wed Nov 9 – Mon Nov 14
DEN-LHR-ZRH-JFK-MIA-SFO = 11,891 flight miles.
Good thing for me American announced yesterday they are going revenue-based on August 1. I might have gone on a crazy buying spree if I had seen this fare two days ago.
Loyalty Traveler – Hotel Promotions Guide.