Pack them in a box and put the box in your suitcase or another box. If you put them directly in the suitcase or outside box, then other items will crush them. If you are only transporting chips, then put them directly in a box and add crumpled newspaper so they won't shift around too much.

Packing a bag of chips for travel requires preventing two things: the bag from "popping" due to pressure changes and the chips from being crushed. To prevent a "pressure pop" on a plane, you can carefully poke a tiny pinhole near the top of the bag to allow air to escape as the cabin de-pressurizes, then cover it with a small piece of tape once you land to keep them fresh. To prevent crushing, the most effective method is to "air-cushion" the bag: place the chips in the center of your suitcase, surrounded by soft items like sweaters or towels, ensuring there is no direct pressure on the bag from the suitcase's hard sides. A more "pro" method is to place the bag of chips inside a rigid plastic food container (Tupperware) or even a clean, empty cardboard box within your luggage; this creates a hard shell that protects the fragile contents from being smashed by other items. If you are carrying them in a backpack, always place them at the very top and ensure you don't shove the bag under the seat where it could be kicked or stepped on during the flight.