[Open Culture has the rundown][link]. You can buy back issues for [$2.99 a pop][amazon], or read them all with Kindle Unlimited.
But that’s not all:
>Jerrick Media, owners of the Omni brand, have also begun to make available on [Vimeo on Demand episodes of Omni: The New Frontier][vimeo], the 1980s syndicated television series hosted by Peter Ustinov.
[link]: http://www.openculture.com/2017/06/omni-the-iconic-sci-fi-magazine-now-digitized-in-high-resolution-and-available-online.html “Omni, the Iconic Sci-Fi Magazine, Now Digitized in High-Resolution and Available Online | Open Culture”
[amazon]: https://www.amazon.com/Omni-Magazine/e/B00TXRHGZ8 “Omni on Kindle”
[vimeo]: https://vimeo.com/ondemand/omnithenewfrontier “Omni on Vimeo”