Cheapest 1 day SW tickets?

[Koh1977]

Planning a trip in August to WDW and possibly SW. DS really wants to go to Sea World, but it's expensive for just the day when you're adding it on to a DW trip already. Do they still have the 20% discount for Southwest Rewards members? Is that only on adult tickets or child tickets as well? How does that compare to Undercover Tourist prices?

We will have 2 adults and 1 child.

Thanks!

 

[Koh1977]

They seem to be about the same in price really...?