The Brazilian is keen on staying at Stamford Bridge, having signed a short-term deal through the end of this season, but talks over how long of an extension he could muster from the Blues remains a big sticking point.
But the 31-year-old Sao Paulo native does envision himself playing in the United States eventually.
"I have plans to stay in Europe and try to play here maybe for three or four more seasons," Willian told ESPN Brasil's Futebol no Mundo. "I believe I can still perform on a high level. After that, when I will be 35, 36 years old, I intend to go to the United States and play there. It is a goal that I have.
Frank Lampard's side has bolstered their midfield options after signing Timo Werner from RB Leipzig and Hakim Ziyech from Ajax Amsterdam, but Willian has been in good form since the restart of the season. He scored twice in this week's defeat to West Ham United.
Willian points out, however, that he doesn't want to immediately return back to his native country. The ex-Corinthians man jumped to Shakhtar Donetsk in 2007 before making the switch to Chelsea in 2013.
"I don't rule out returning to Brazil, it is my country and my culture. But returning to Brazil would not be my first choice if I leave Europe. I have the wish to play in the United States also because of my family, being able to live in the United States would be good.
"My family would feel great and so would I. For now, Brazil is not crossing my mind. Of course, that could change and I can realize one day that I want to go back to Brazil. Maybe go back to Corinthians and retire with the club. But my goal right now is to stay in Europe, play for maybe three or four more seasons and then go to the United States and we will go from there."