Norwegian Airlines has nonstop flights to Paris CDG from Los Angeles LAX at $310 round trip and even lower $298 round trip flights from Oakland for travel departures January to March 2019. Lowest ticket prices are available by purchasing two one way tickets with lower one way fares from Paris to California through European websites.
A round trip ticket prices about $30 to $40 more when purchased through the USA website.
Google Flights might take you to the Norwegian USA site with higher priced Paris-California one-way ticket prices. You can change to a European site by going to the bottom of the Norwegian Airlines US website page and changing the language, which changes Norwegian Airlines website to an international site with pricing in the local currency.
Go to bottom of page and change language.
Norwegian Airlines Los Angeles LAX – Paris CDG (USA website)
Norwegian Airlines Paris CDG – Los Angeles LAX (USA website)
Norwegian Airlines Paris CDG – Los Angeles LAX (France website)
€139.90 one way Saturday March 9, 2019
Los Angeles LAX to Paris CDG is $40 lower as a round trip itinerary when LAX-Paris one way ticket is purchased through the Norwegian Airlines USA website and Paris-LAX one way ticket is purchased through Norwegian Airlines France website.
Norwegian Airlines Oakland OAK – Paris CDG – Oakland OAK
LAX-CDG 149.99 one way USD + CDG -LAX €129.90 one way ($148.03)