"Maiden voyage" is commonly used to describe the debut voyage of a ship or an airplane. However, there are a number of synonyms for this phrase that can add variety to your writing. One option is "inaugural journey," which has a similar meaning to maiden voyage. Another synonym is "virgin expedition," which emphasizes the newness and purity of the journey. "First journey" is a simple and straightforward alternative that can also work well. Finally, "inaugural trip" and "debut flight" are two other phrases that can be used to describe the first voyage of an aircraft or vessel. Whether you are a writer or a traveler, exploring different ways of describing this momentous occasion can help you communicate more effectively and capture the excitement of the journey.