how do santa's reindeer fly

The reindeer's flight is powered by magic. The reindeer harnesses and bells are enchanted with magical properties that allow them to fly. The harnesses are crafted by the elves, who ensure that each one is perfectly fitted to the individual reindeer. The bells are enchanted to create a magical sound that guides the reindeer on their journey. The reindeer themselves also possess some magical abilities that help them fly, such as the ability to manipulate the wind and the clouds to their advantage.