You can choose between a regular ticket that can give you access to one whole park from either Disneyland or California Adventure. The other option can be buying a park hopper ticket which allows you to go to both parks Disneyland and California Adventure.
Looking at $135 for 1 park during peak season
Usually weekend rate is highest at 135 for adult and 127 for child. You can upgrade to go both parks with additional of$50. Hope this helps. Online with other website are expensive. The lowest price for adult is 97 but during the lowest season
"One-park" ticket covers one park (either Disneyland or California Adventure). A "Parkhopper" gets you admission to both parks. The prices vary on different days and you can purchase multiday tickets. Hope this answers your question.
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