Can I use the skype app on my Verizon iPhone in Germany via wifi?

I am leaving for a year of study abroad in Germany and I have the Verizon iPhone 4. I know that I will not have service on the phone itself but via WIFI I will be able to access internet and apps. Will I be able to substitute my service for Skype to call home? I know that Skype has plans where I can but what I need to know is will my phone be able to do that in WIFI areas? So instead of paying for a new phone, just use my iPhone to call home on Skype in WIFI areas. Is this possible?