DeGea's contract expires in June 2020, if it does not renew in this 8 months on July 2020 1st, he can leave Manchester for free.
DeGea isn't going to leave England for Italy mate. Most likely he will choose Spain (his country), perhaps Madrid or Barcelona, and end his career there.
All that is said here, is possible. He could have been to Spain and could also be to Italy or even he would still survive in Britain again. All of the things that I mentioned could happen, we just need to wait for the time again.