One or two days. Make sure you go on the broomstick Harry Potter ride right when the park opens because the line can get long fast.
2 or more
It takes a minimum of two days to see all of Harry Potter in both parks.
One day should be good, to do things maybe twice two days, but really one day of low to medium capacity and you can experience everything the park has to offer.
One day should be enough. Get there early to go straight to Harry Potter World where the line is better
One day. Go early morning right when it opens and straight to Harry potter world as that's the most popular then work your way to walking dead, tram, Simpson's and then to the bottom area.
One day you can cover pretty most of the rides
Maybe 2 or 3. It's really expensive lol.
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