How long will it take to get 99 fletching from 55

It would take a long time because you would have to fletch over 100,000 items depending on what you fletch. - Actually, depending on what you fletch willow longs, maple longs, then yew longs(starting at the soonest level you can fletch each). It should only take a week or two, if you play 6-8 hours a day. 3 weeks if you play 3-4. More if you rarely play. From 55 to 99 I'd say maybe 2-3 weeks.