need to fallow several rules. First of all, select proper term for your cheap flights Italy is really hot land, therefore you do not need to travel there during hot season (read on). Go there in June an September and you will have a lot nicer deal not only on flights but also on accommodation. Also, there will be less tourists on the streets, so you will be able to enjoy it more. The most popular destination is Rome, but you could also travel to Milan and Florence.
Another great alternative is to book flights to Slovenia. This is maybe not really famous destination from Poland, but it is very worth to be seen. This country got a phenomenal wildlife, nice towns with amazing attractions, tasty meals and friendly citizens. Even when this land is so tiny, it has all types of attractions. When you want to lay on a sand all day, you will find there nice
resorts by a seaside (website). If you prefer to climb on a hills, you can use some of tourism tracks within the Alps.