Another budget solution with low-cost carrier Norwegian this time to sunny California when departing from various European airports. Roundtrip tickets to Oakland (San Francisco) from Scandinavia are now starting at just €257, from London already for £262 or Berlin from €327. This is including all taxes and fees however checked luggage, inflight meals or seat reservation are available for extra costs.
Norwegian sale is valid for flights departing from Europe to USA between November 2016 and March 2017. Blackout period around Christmas holidays. Since Norwegian offer month´s view you can easily check travel dates from your origin directly at the website of the airline.
Booking sample of Return flights from Europe to California (Oakland) from €257! In this case you would fly from Stockholm to USA on 27th of January 2017. Your return flight from North America back to Sweden would be on 10th of February 2017.