Best way transport Belgium - poland

Hellow polish people from my work, now friends, want that i come with they visit Zakopane.

They living all a round kielce

I living in belguim very close to Maastricht (holland)

How is best i can travel, i look for flexbus but this are 28 hours,
With train 6 times change
And plane are only from Eindhoven to Krakau or Warschau...

Little advice or tips

There is no easy way to do that journey unfortunately but the flight from Eindhoven option would probably be the quickest, about twelve hours. You could always spend a night in Krakow to break the journey :

rome2rio.com/map/Maastricht/Zakopane#trips/transport/Maastricht/Zakopane/r/Train-to-Eindhoven-fly-to-Krakow-train

Kraków is only about 100 km (in a straight line) from Zakopane (it is a mountainous terrain though so it's about 2 hours drive or a 2 hour jouney on a express train)

By your own car.

Krakow to Zakopane would work best, but then expect a lot of traffic during the holidays. If you can, visit Zakopane after the new year.