USS sells one-way pass tickets and express tickets. It is highly recommended that you reserve your tickets online at particularly because it's less costly and you will not have to queue! The suggested time to visit USS would definitely have to be on the off-peak days, which are usually the weekdays.You can also observe the USS calendar which can be found on their site. There, it'll state the off-peak and non-peak days, in addition to the timings and blackout dates. Blackout dates imply the dates that the park may expect enormous crowds. For example Singapore public holidays!