Final answer:
Oliver Twist was nine years old when he fled to London in Charles Dickens' novel.
Step-by-step explanation:
The question "How old was Oliver when he fled to London?" refers to the character Oliver Twist from the novel Oliver Twist by Charles Dickens. Oliver Twist was nine years old when he fled to London. It is an important turning point in the novel and marks the beginning of his many adventures in the city.