5e SRD 5.2.1 · 5.2.1
Special Movement
Gameplay Toolbox > Special Movement
If a party can travel at a high Speed for an extended time, as with a spell such as Wind Walk or a magic item such as a Carpet of Flying, translate the party’s Speed into travel rates using these rules: Miles per hour
Speed ÷ 10 Miles per day (Normal pace)
Miles per hour × number of hours traveled (typically 8) Fast pace
Miles per day × 1⅓ (round down) Slow pace
Miles per day × 2/3 (round down) If the characters are flying or their special movement allows them to ignore Difficult Terrain, they can move at a Fast pace regardless of the terrain.