In general, when booking your flight to Croatia, February is the cheapest month on average.
On average, from most locations, when planning your trip to Croatia, try to book your flight in the region of 45 days in advance for the cheapest prices.
From most locations, the cheapest day to fly to Croatia is Tuesday. Most users found that departing on a Friday was most expensive.
On average you can find the best deals on plane tickets to Croatia when looking for flights with midday departure times.