Night law schools
I, personally, have never heard of online law schools. It's probably not feasable, given how law students seemingly spend most of their lives in the law library and how class participation is important. You'll know what I mean if you ever saw "The Paper Chase."
I am 99.995% sure that most law schools have night programs.
Western New England College School of Law in Springfield, Mass. has had a night program for years. My wife is a former WNEC law librarian and she most certainly will vouch for the program!
I had an acquaintance who attended
Western State University College of Law in Orange County, California. He attended full-time thirty years ago, but the school has part time programs. The place did the job for him.
Just as is preached about other forms of higher education, be sure that the law school you select is accredited, not only by the normal accrediting bodies but by the American Bar Association. ABA accreditation is important so that your J.D. is recognized in all fifty states. Western State was not ABA-accredited when my acquaintance attended. Its grads could only practice in California. That was fine for my acquaintance because he lives in California and had no plans to leave. WNEC Law School is fully accredited, by the ABA and others.
My wife has pointed out as I type this that a great many law schools now offer electives in aviation law.
Hope that helps.