Bus communication is the most convenient way of traveling in this region. Koscierzyna has connections to most of the cities in the region including the biggest ones: Gdansk, Gdynia, Slupsk, Chojnice. See the Koscierzyna timetable [dead link] for details.
Getting to Koscierzyna by bus from different cities:
See the Koscierzyna timetable [dead link] for details.
Getting to Koscierzyna by train from different cities:
The closest airport to Koscierzyna is Gdansk Lech Walesa Airport. From the airport's train station Rebiechowo there go regional trains to Koscierzyna, they do not go very often though, so in most cases it's easier and faster to get to Gdansk and take a bus.