Well, it depends entirely on what level you are bow, and what you're fletching.
If you're level 1, then the average time, if you're constantly fletching is about 3 months. I'm level 80 fletching and it took me about 2 weeks to get there, and i reacon i could get 99 within the next two months. It also depends on how much money you have, If you're not too rich, it's suggest fletching willow bows due to the price of willow logs (around 9gp). Then wait until you have enough money to make yews to 99.
Chat with our AI personalities
It all depends on your current level, amount of cash you have lying around, and what you will be fletching.