There are several synonyms for the phrase "ticket to ride." Some alternatives could include "boarding pass," "travel document," or "flight voucher." These terms all refer to the proof of permission to travel and allow individuals access to various forms of transportation, such as airplanes, trains, or buses. Other possible synonyms may depend on the specific context in which the phrase is being used. For example, "admission ticket" or "entry pass" could be synonyms if referring to gaining access to an event or attraction. Overall, there are several ways to express the idea of a "ticket to ride," each with its own nuances and connotations.