FHSU still has their online program on a 16 week semester. I know 16 weeks is traditional, but I found that I prefer the shorter courses.
University of Texas of the Permian Basin offers some semester long online classes. I think they're 15 weeks? But I don't know that they offer all the classes needed for an MBA in that format.
BEST online MBA program 4 years running https://businesswest.com/blog/isenberg-ranks-first-for-mba-online-education-in-u-s-for-fourth-straight-year/