The scene where Bowen and Draco sit by the campfire, without trying to kill each other. Even more so in the novelization, as Draco awakes to see Bowen dozing against his curled-up body.
The scene after Bowen's faith in the Old Code is restored and Draco quietly walks over and shields Bowen from the rain. Such a beautiful image and a powerful show of their friendship. In the novelization, Bowen reaches out to Draco atop King Arthur's monolith, and Draco wraps his wings around Bowen.
Draco and Bowen watching over the villagers they've trained to fight against Einon, and Draco commenting that he finally has everything he's ever needed. In the novelization, Draco has Bowen climb on his back and they fly around the rebel camp. Draco says the age of dragons is over and that it's now up to humans to shape the world. Which only makes the ending a few scenes later all the more gut-wrenching.