A Mars mission with Space X's starship would only take 30 minutes, since that's how long they last before they explode. https://news.google.com/read/CBMickFVX3lxTE1RSjVIR2Z1T3RhNnpMd0FEMGU3M0tEMl9ESjI5UW1tM0U3Z2V3NEMxOHcxM2sxMGt6SmF1UktqejZKNXRwUFJPTUJoRUxzRjVjR2JVVEF3My0xMGI4cFI2MDZyWXBPeEg4YmNDNXdPTWV4Z9IBcEFVX3lxTE1uQkJYUEtWMURXOHotWnRkQkZjal9xdVliVE5ZZTJSR01JQVBZYnM4anhicHBFdC1UNkt6eXpVd0lFTi1VdFJEaFRsbmdfQnp0eFRHcUx1SDFEQnk5anRLUTdZTWU2S1NndFVZSExVeHc?hl=en-CA&gl=CA&ceid=CA%3Aen