Itinerary design is the professional practice of curating and organizing a travel experience into a logical, efficient, and engaging sequence of events. In 2026, it has evolved from simply listing flights and hotels to a high-level form of "experience architecture." Modern itinerary design uses data-driven insights and personal preferences to balance "active" days with "rest" periods, ensuring travelers don't experience "burnout." It involves selecting the best transportation links, vetting local guides, and timing activities to avoid peak crowds. According to 2026 travel trends, 74% of travelers now want their itineraries to reflect their personal identity and values, such as sustainability or "local deep dives." Whether performed by a professional travel advisor or an AI-driven planning tool, successful itinerary design transforms a series of separate bookings into a cohesive "story" or journey, optimizing every hour of the trip to maximize value, cultural immersion, and emotional satisfaction for the specific traveler.