Try this:
- Go to the world map.
- Select any aircraft besides the Santa sleigh.
- Select your departure airport and select a runway rather than a gate/parking.
- Optionally select your arrival airport.
- Click on your chosen aircraft in the top left hand corner and now choose the Santa Sleigh and then click on the Santa Sleigh in the top left hand corner to close the aircraft selection screen.
- Click Fly.
