How far in advance can you buy Universal Express Unlimited passes online?
I believe you can buy them pretty far out. They are date-specific, as the cost varies by date. HOWEVER, I would never recommend buying them in advance, as you may get to the parks and realize you don’t really need them. If you do end up needing them, you can buy them onsite the day of.
But can you? Being a worrier, I’m always concerned that I’ll show up, want an Express Pass, but find they’ve sold out.
I can understand being a worrier, but I have never heard of an instance of them selling out. But, that being said, peace of mind always prevails, so act accordingly!