A bird? A plane?
Wingsuit flies from the Rocket Hangar to the Launch Pad on Orbital.
Real simple, follow these steps. Launch a Solo/Co-op mode on the map Orbital with Beginner level AI. Boot in and select character specialist ‘Sundane.’ Post the countdown, proceed towards objective A1, which is the skyscraper facing the rocket. Jump off the roof of that building and wingsuit towards the rocket without touching the ground till you get there.