So, say you have Gold, Platinum or Executive Platinum (or the equivalent) on an airline, and you would like to fly Virgin America (VAm) but have no status with them. Now you’re in luck!
Virgin America has Elevate Silver and Elevate Gold levels, and will match you into one of them if you have status on American, Delta, Southwest or United.
The Southwest Airlines rule is peculiar…VAm will match you into Elevate Gold if you have a Companion Pass on SWA. Many of us don’t think of the Companion Pass as a status level, but evidently VAm does.