In general, when booking your flight to Warsaw, January is the cheapest month on average.
In general, most flyers find the cheapest time to book a flight to Warsaw is about 48 days prior.
From most locations, the cheapest day to fly to Warsaw is Sunday. Most users found that departing on a Wednesday was most expensive.
Typically, cheap prices to Warsaw are most often found for evening flights. Cheap prices are less likely for morning flights.