I just discovered Susi Air a day or two ago and joined yesterday. This is my first experience with a virtual airline and I had no idea how it would be operated. The key element is software called smartCARS. To start a flight you find the flight you want, either through smartCARS or on the Susi Air Virtual website. Then you select that flight in smartCARS and start the flight.
I’ve had a lot of problems with the airport codes being incorrect, or different, or non-existent in X-Plane. They are also very hard to find or missing in skyvector but I just found a site that has information and weather on 29 of them called Our Airports.