When it comes to synonyms for "flow by", several options come to mind. The phrase "pass by" is a direct substitute that conveys the same meaning as flow by. Another excellent option is "slide past", which emphasizes a smooth and effortless movement. "Drift away" is another synonym that packs the same punch as flow by, highlighting a soft and gentle motion. "Float by" is another alternative, which emphasizes the effortless and weightless nature of the movement. "Sail away" is also a relevant synonym for the phrase, indicating a swift and seamless flow. Whether describing the passing of time or the motion of an object, these synonyms for "flow by" provide a range of options to convey your message.