When traveling to Poland, a valid passport with a visa is generally required, although U.S. citizens do not need entry visas. A visa is easily obtained at the Polish Consulate in the country of residence. It is generally issued for a period of three months, for one or for a limited number of border crossings.
Visas are also obtainable at Warsaw airport on arrival.
However, bilateral agreements allow the citizens of the USA, UK, France, Germany, Italy, Austria, Denmark, the Benelux countries, Sweden, Finland, Norway, Spain, Portugal, and Greece to move freely in and out of Poland without visas for up to three months. A visa's validity may be extended to up to one year, and exceptionally to two years.