From most locations, the cheapest flights to Zagreb can be found during the month of February; however great deals can be found at other times.
On average, from most locations, when planning your trip to Zagreb, try to book your flight in the region of 37 days in advance for the cheapest prices.
In general, booking your departure to Zagreb for a Tuesday represents the best deal on airfare. Try to avoid a Thursday departure to stay away from the highest prices.
On average you can find the best deals on plane tickets to Zagreb when looking for flights with morning departure times.