Star Alliance Los Angeles LAX to Zurich, Switzerland is $478 to $485 and SkyTeam $488 round trip. Several cities across Germany are priced in $520s January to May 2017 departures with SkyTeam. Star Alliance has same cities on sale, but only into March.
Air Berlin has LAX-Dusseldorf at $496 round trip Jan-March.
Star Alliance and Air Berlin are primarily January to March sales, while SkyTeam extends to late May.
Star Alliance LAX – ZRH $478 Swiss (can be booked via Swiss or United.)
Delta Airlines Los Angeles LAX – New York JFK – Zurich ZRH – New York JFK – Los Angeles LAX
Other cities are on sale too, like Bremen, Nuremburg and Stuttgart.
Air Berlin Los Angeles LAX – Dusseldorf, Germany DUS nonstop flights
Orbitz Ticket: $495.54 round trip Mon March 13 – Wed March 22
Same flights are priced $516.80 on AirBerlin website.