Another competitive option from Dusseldorf to California these days this time based on British Airways, UK flag carrier and member of Oneworld alliance. Round-trip flights to Los Angeles are now available already for €299 and to San Francisco from €356 in winter season 2017/2018 . Flights have one short layover in london on your way. Remember you can not skip first leg of your outbound flight between Germany and UK. Rest of your itinerary would be cancelled..
British Airways promotion is available for flights between November 2017 and April 2018. Blackout period around Christmas holidays. Max stay 3 months. Discount applies to bookings made till 15th of July 2017 or till the cheapest tariff is sold out..Below you can find our booking sample.
Booking sample
Dussledorf - Los Angeles for €346 (Directly with BA also compare your travel options there)
To book your accommodation in Los Angeles in advance you may use Booking.com.
Booking sample of latest promotional sale of British Airways cheap flights from Dusseldorf to California from €299 here. In this case you will be departing from Germany to Los Angeles on 28th of January. You would be returning from USA to Europe on 10th of February 2018.