Getting to the Moon typically takes about three days from launch to arrival in lunar vicinity, though the exact duration depends on the mission profile and spacecraft design. Here’s a concise rundown of the main factors:

• Robotic vs crewed missions: Robotic missions often aim for rapid trans-lunar trajectories, while crewed missions spend additional time on checks, orbital insertion, and life-support sequencing. In practice, crewed Apollo-era missions entered lunar orbit roughly 2–3 days after launch, with landing times following after trajectory corrections and orbital maneuvers. [general spaceflight knowledge as of multiple historical missions]
• Trajectory design: Some profiles perform rapid trans-lunar injection and direct coast segments, minimizing time en route, while others include gravity assists or lunar eve/near approaches that can extend the timeline. Typical transit windows cluster around 2–4 days depending on mission goals. [historical mission data and spacecraft design principles]
• Notable extremes: The fastest recorded flyby of the Moon by a spacecraft (not stopping at the Moon) is about 8 hours 35 minutes, but missions that actually travel to and/or land on the Moon generally take several days, with Apollo-era durations around 3 days to reach the Moon and enter lunar orbit. [historical mission data]

If you’d like, I can tailor the estimate to a specific scenario (e.g., a modern crewed lunar mission with a particular propulsion system, or a robotic lunar orbiter) and provide a more precise timeline with typical phases (launch window, translunar injection, coast phase, lunar capture/orbit, and any landing/return planning).