What does itineraries?

Itenary is a Noun. As a general rule, you cant have synonyms or antonyms for Nouns. (Tho there are a few exceptions.) Its like asking for the opposite of Pen.

An itinerary is a detailed plan for a journey or route, typically describing what you might need, directions you might need to take, and other useful information.

honourary, January, February, hari-kari, temporary

A list of things to be done, normally planned out in a particular order, with some additional details. On an organised holiday, there may be a list of places to visit, the times of arrival and...

a full schedule of everything that your going to do during your trip