What does the term "itinerary" refer to in travel planning?

In travel planning, the term "itinerary" specifically refers to a detailed plan that encompasses all elements of a trip. This includes the travel dates, transportation methods, accommodation details, activities planned, and other relevant information that travelers need to follow during their journey. A comprehensive itinerary serves as a roadmap, allowing travelers to navigate their trip efficiently and ensures that all necessary arrangements are considered.

While the other options mention aspects related to travel, they do not capture the full scope and specificity of an itinerary. For instance, a list of potential destinations outlines places to visit but lacks the structure and detail necessary for actual travel planning. Similarly, a proposal for group tours may include an itinerary, but it is more about pitching a travel experience rather than detailing an individual traveler's plan. Lastly, a summary upon returning from a trip doesn’t fit the definition of an itinerary, as it pertains to reflection rather than the proactive planning of travel activities. Thus, the correct definition of an itinerary is encapsulated in a detailed plan of all trip elements.