390 - 800 EUR
In general, when booking your flight to California, November is the cheapest month on average.
On average, from most locations, when planning your trip to California, try to book your flight in the region of 60 days in advance for the cheapest prices.
On average, the cheapest flights to California are found when departing on a Wednesday. Try to avoid departing on a Sunday, as this is usually the most expensive day.
On average you can find the best deals on plane tickets to California when looking for flights with morning departure times.