Should I buy Las Vegas show tickets online or wait until we get there?

If you want to guarantee that you can see a particular show, then it's best to buy the tickets in advance. Many of the popular shows sell out, and you might find yourself out of luck. If you are more flexible about what you see, then wait until you get to Vegas and check out one of the Tix4Tonight booths on the strip. They offer discounts on same-day shows, sometimes up to 50% off. But you never know what they're going to have each day, and the selection changes daily. You can't expect that they'll have one of those shows available. Sometimes they do offer Buy One Get One Free or 1/2 Price tickets to Jubilee; they are in the coupon books in the taxis or at the concierge desk. But again, that's not a regular thing, so you can't count on that being offered while you're there, or on the seats being available.

catch 22, if you want better seats buy inline, if you want cheaper seats wait til you get there

Online, that way you don't need to worry about it when your in vegas, you would already have it.

Buy it online.

Buy Las Vegas Show Tickets

If you dont buy early you take chance you cannot get tickets for the night or seats of choice