They are so commonly found together that some mistake dyslexia and ADHD for the same thing, but, to be clear, dyslexia and ADHD are two different disorders one to do with attention and behavior and the other specifically to do with reading. Still, the significant overlap (co-morbidity) suggests some related cause.
Non-stop flight time from Boston to Seattle, WA is around 6 hours to 7 hours. Fastest one-stop flight between Boston and Seattle, WA takes close to 8 hours.
Check the Flight distance between Montreal and Boston MA. Travel time is an important point to know with the driving distance. Hence you might also want to know the Travel Time from Montreal to Boston MA. This will help you estimate how much time you will spend travelling for the distance from Montreal to Boston.