How do you join a virtual airline?
Have a scroll through #live:va category and then follow the prompts listed in a Virtual Airline’s thread,
eg - Send an application through their website etc.
In American Virtual’s thread, to join their Virtual Airline,
You would click on the “Apply” button which will take you to their website to send in an application:
You can additionally check out the Infinite Flight VA Database which lists every VA/VO in Infinite Flight through the website below: