Hermes' Boots

Hermes boots negates fall damage and allows you to run faster. To fly with Hermes' boots double tap jump to start gliding, then crouch to dash forwards and gain speed. Dashing first then activating your glide may be more effective. You can also use a trident enchanted with Riptide to get some kind of double dash (while in water) (Keep in mind that wearing an Elytra and using Hermes boots still uses the Elytra's durability)