On the map Terminal, use a class with a pistol, marathon, lightweight and ninja pro.

Get out your pistol and walk to the orange chute leading to the plane. To your right there are a group of boxes.

Sprint towards the boxes and jump at the edge of the chute. If you land on the top box, turn towards the nose of the plane.

Run and jump onto the nose of the plane and when you land quickly move up left.

This may take a few tries but it works well.