Unless, of course, the landlord reasonably relied on the OPs words and that reliance caused him damages.
It wouldn't be a landlord/tenant thing, just a quasi-contractual thing.
Thank you all for the advices. He claimed that since I told him I would move out on Sep. 1, that's why he bought the ticket to meet with me for the moving out inspection. I mean, it's not like I purposely didn't move out on time. I couldn't get the movers to do it on that day...