The Elytra Booster Addon replaces the snowball with an explosive booster item. You can throw the item at the ground to cause a small explosion which will launch you up toward the sky. Just make sure to keep a bunch of them with you and throw multiple of them at the same time as this will cause you to be launched up into the sky much higher.
How does it work?
You can obtain booster items from villagers for free. It says it's a Firework Rocket but that's just a bug. It's supposed to say it's a booster probably.
- iOS / Android: Long press on a villager and press the button and the items drop
- Windows 10: Right-click on a village and the items will drop
Put on a pair of elytra wings and start gliding. Whenever you get too close to the ground just throw a snowball down at the ground to be boosted up into the sky.
This won't work great in survival mode since you will take damage from the explosion. Hopefully that's something which will be addressed in a future update.
As long you got booster items you can fly pretty much wherever and how long you want without any interruptions.
The addon is called Infinite Elytra. I decided to call this post "Elytra Booster" since I thought that "infinite" is a bit misleading. I hope that's alright.