TY the Tasmanian Tiger

Gliding is an essential part of the game, as you will often need to glide in the air to reach platforms, collectibles, and complete the levels. Therefore, you will be gliding a lot, and since 1,000 meters isn't too much, you will gain this fairly early in the game. Personally, as I was completing levels and going for the collectibles, I was able to glide the required 1,000 meters two levels into Zone B. Time to unlock will vary based on how often you glide.