Synonyms for the phrase "happy landing" could include "safe arrival," "successful touchdown," or "smooth descent." Other options could be "pleasant arrival," "joyful landing," or "degree deplane," the latter being a play on words as "deplane" means to disembark from a plane. Additionally, "felicitous touch down," "blissful arrival," or "triumphant landing" could also be used as synonyms. The phrase "happy landing" is often associated with aviation and planes, so words like "aviation arrival," "plane descent," or "flight touchdown" could be more specific synonyms. Regardless of the terminology chosen, the sentiment of a successful and enjoyable arrival remains the same.