Albatrosses rarely flap their wings. The only real effort they expend during flight is taking off. Once they enter a steady flight mode, they can go for long stretches without flapping even once, relying entirely on the dynamic lift in the air and utilizing the wind shear above the sea to gain momentum.
If an albatross can do it, there's no reason a dragon can't.
Flying from the desert to Watchtower Port took Leon and Tassera half a day, but in terms of energy expenditure, it was negligible. Yet, that didn't stop Leon from landing in Watchtower Port under the pretense of exhaustion, insisting they needed a huge meal to replenish their energy.
"Do you remember what Watchtower Port looked like the last time you left?" Leon refused to land with Tassera on the Volcanic Island, opting instead for Watchtower Port. His primary intention, of course, was to show off.
Look how far Watchtower Port has come under my rule.
