Virgin Atlantic has a new official status match program that will match the elite status of another airline’s frequent flyer program for a full 12 months. (Oftentimes these status matches are unofficial and only last a few months.) To request a status match, you must already have a future flight booked with Virgin Atlantic in either Premium Economy or Upper Class. You must also show that you fly enough overall to possibly qualify for future status.
Here are the qualifying airline programs that will get you either Silver or Gold status for free with Virgin Atlantic. Note the absence of Delta as they are 49% owner of Virgin Atlantic.
Here is the Gold/Silver benefits table for Virgin Atlantic.
It’s kind of amazing they don’t even bother to match Gold on United.