Maintaining regular bowel movements can be especially difficult on airplanes. supakitswn/ShutterstockTravel often involves changes in diet, routine, and time zones, which can impact bowel movements.As a dietitian, I pack a few things in my travel bag to avoid constipation and stay regular.I always bring electrolyte packs, prunes, and fiber-filled snacks when I travel.I recently traveled between the US and Greece, and I wasn't going to let travel constipation ruin my dream vacation.As a dietitian, I've learned that traveling can disrupt bowel-movement regularity for several reasons.Changes in environment and routine can lead to stress, which can upset the digestive system.