As someone who travels a bit and has a lot of plants, I have a good bit of experience with this. How well plants do for an extended period without watering depends a lot on temperature and on how much sun they get. (Probably humidity too, but I'm really judging by season.)

I make sure to water plants very well before I leave, and often (for some of them) leave water sitting in the tray at the bottom for them to draw on for a bit. That's generally just fine for 2 weeks in summer or 3/3.5 in winter.

Longer than that (by a week, anyway) and the plants are still alive but I have to cut a bunch of dead leaves off of them and clean them up a bit when I'm back. Some of them also take a *lot* of extra water when I return (e.g., soak up the normal weekly amount 3 days in a row).