I had my N400 interview in Chicago on 9/15/22, there was no same day oath available. I'm still waiting for my oath ceremony date. Also curious to see how long people in Chicago have to wait for their oath ceremony after their N400 interview. My interviewer said I should receive a notice in 2 weeks after the interview, but it has been almost 4 weeks now. Can't wait to get this over with, since I need to make some travel plans. Good luck!