How long will you stay in Switzerland? Hopefully get out of Zurich a bit like to Alpine areas - say takes 5 days - then chose either Paris or Italy IMO - can take trains to either. June is a perfect time for say the wonderful Jungfrau Region - the dreamy Alpine Switzerland many of us dream about seeing Zurich can be neat with a friend but go get out of it and see Alpine Switzerland.

PalQ~ She doesn't have time for that. She only has 10 days with FOUR separate countries on her wish list.

Thank you very much for all your input. This is what I decided to do. Arriving in Paris- Zurick-Berlin ( I will do Poland on another trip).
Thabk you again.

3 days in each with a travel day in between? I'd also leave Berlin for the Poland trip - Berlin is very close to Poland. Spend more days in Paris and Zurich (maybe going to Alps for few days with friend?)

Oh I see from other thread you will spend just one day in Paris not 3 so enough time for other two. Why just one day in Paris-curious?

Never been in Europe before - don't try to cover it all in a few days. slow down - stay a few days in Paris and a few in Berlin -at least a few - too bad you bases are not close to each other.