They only sell the one day/two park at the gate not online. You can purchase a one day/one park online and later upgrade to the second park at Guest Services. This is often a good idea as you might not have time to get to the second park in one day. If you find you have the time to make it worthwhile to pay for the second park, just go to Guest Services and upgrade before you head over to the other park. It costs $10 plus tax to upgrade to the second park.
A one day/two park ticket at the gate costs $77.75 (this is the total price which includes the tax) If you buy a one day/one park ticket online for $59.75 plus tax (for a total of $63.64) , you can upgrade it for $10.65 (total price) to the two park at Guest Services so you will save a little over $3 that way.
I recommend doing it that way anyway just in case you don't have time to get to the second park. That way you wouldn't have paid for something you couldn't use.
