Looking for a budget solution from Europe to California and can travel only with hand luggage then we have some good option for you based on Icelandic low-cost carrier WOW air. Roundtrip flights to San Francisco or Los Angeles are now available from €300. Note that this is including hand bag only, checked luggage is for additional surcharge. Look for flights departing from Germany (Berlin, Frankfurt), Amsterdam, Paris, Copenhagen or London.
If interested in this deal with WOW air you will find limited travel options between March and May 2017. Some of the flights may require longer layover in Iceland. Below you can refer to our booking samples from each of the European cities.
Booking samples
Travel dates vary by each of the origin and destination city so the quickest would be you compare your options directly at the website of the carrier.
Booking sample of budget flights from Europe to California from €300 here. In this case you would depart from Berlin to San Francisco on 9th of March. Your return flight from USA back to Germany would be then on 20th of March 2017.