aviation routes&timetables

Hello!
jumbojets fly over my summercottage in coutryside Finland from
northeast to southwest at certain times of day. I wonder if its is
possible for me to identify those planes: what are their departure and
destination airports. In some cases I can see the dominating painting
color of the planes. What I would need would be some kind of
route/timetable database with information about all airlines. Is that
kind of information available for public?
Thanks for any pointers!
molkko