In general, when booking your flight to Poland, January is the cheapest month on average.
On average, from most locations, when planning your trip to Poland, try to book your flight in the region of 47 days in advance for the cheapest prices.
From most locations, the cheapest flights to Poland are found on a Tuesday. Booking a Wednesday departure is usually the most expensive.
Typically, cheap prices to Poland are most often found for evening flights. Cheap prices are less likely for afternoon flights.