1. Choose World Map
2. Choose any plane (I used Cirrus SR22)
3. Select an airport with fuel station for departure, you can see an example in the picture below ( EFHF - Malmi, Helsinki)
4. Choose the starting point as a "fuel box" from the dropdown choice below the airport
5. Choose any airport as arrival airport and start the game
6. The game starts you at the ground fueling station and it pops up the Fuel menu automatically. Just take the slider all the way to 100% so that the plane is fully fueled and the achievement should popNote:
If the fueling menu doesn't pop up automatically, choose the Fuel menu with your mouse from the top of the screen.