Of your two options, the best may be "This ticket is limited to a single day." But another option that may be a bit clearer is "This ticket may be used for one day only."

Both sound okay, but I would choose "to" instead of "for". The preposition that goes with the word "limited" is usually "to" after it. It can be about time, space, amount, etc. Examples: I have limited myself to three cups of coffee a day. The dogs are limited to the park. The exam is limited to three hours. A limit "for" means it has the quality of being limited, for that amount of time/space/etc. "For" might also mean "because of". So using "for" here can become confusing. A limit "to" means that the thing following "to" is the limit itself. I am limited for ten minutes. = I am limited (can be whatever kind of limit), with a duration of ten minutes. I am limited to ten minutes. = I have a maximum of ten minutes (whatever context). This ticket is limited for a single day. = It CAN mean that the ticket has some limit, in that specific day (and therefore no longer has a limit after that day). This ticket is limited to a single day. = The ticket is useful only a single day. In short, I think it's best to use "to" in your example.

The ticket is valid for one day only