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).

This applies to my two drysenas & multiple philodendrons. (Assuming I have the right names! Google image search.) The snake plant and christmas cactus can probably last a good bit longer. The bromeliads are similar to the first group but leaves can brown at the ends.

The potted hydrangea is more sensitive and probably wouldn't survive longer trips that I used to do, at least in summer. And I move some plants away from sunny spots into shadier ones if I'm away a long time. (But philodendron & drysena in shady spots anyway.)