Why can't I select any dates for my tickets online? They're all blocked out (With slash marks through all the dates)

Universal has not sold out any days i am employed there n depending on what ir trying to do if it volcano bay it gos by weather n Tuesday n Thursday there close

They maybe sold out or the system is down

They may be sold out

Sold out probably

Sold out for those days so you may be able to buy them at the door.

They sold out already