I live in San Diego, and we made the trip to
Disneyland in less than an hour and a half, but that was early morning before morning rush hour 6-9 am, and before lunch rush hour 11am-1pm. Evening rush hour is 5-7pm. Traffic can be a nightmare during those times.
Sea World is definately worth the trip. As for San Diego Zoo or Wild Animal Park, Wild Animal Park is closer to Disneyland, but I prefer the San Diego Zoo. The Wild Animal Park features massive enclosures and the animals are in settings that look like natural habitats. The only problem is that the enclosures are so large, it can be difficult to spot the animals. When we went we saw the large animals, rhinos, hippos, giraffe's, and elephants, and we saw a lot of deer, antelopes, deer family. The oddest thing about the wild animal park is that many of the enclosures had animals that are local animals, that had made their way into the enclosures. Its pretty dissappointing when you live in San Diego, to watch San Diego native deers, bunnies, etc eat in an enclosure, and the tour guide on the bus even pointed out that they were locals ducking in for a visit.
The San Diego Zoo has a good number of animals, and they are more in zoo like habitats where you can actually find the animals in them. They also have an excellent children's zoo that even adults enjoy. Where you can brush goats, see baby animals (like the nursey with the diaper wearing monkeys), and other fun things. The zoo also has some shows, like the Sea Lion show and an Elephant show (not sure if that still exists though). I can't remember which park, zoo or wild animal park, but one of them just added a bird show. The only perks of the Wild Animal park over the zoo is that you can feed giraffe's and birds at the Wild Animal park. Both parks are a lot of walking. The wild animal park can be really uncomfortable during summer months as it is in the desert. In addition, the Wild Animal park has shorter park hours then the zoo.