The Gen1 Enterprise can arrive at Mars within 90 days of leaving Earth’s orbit. This is derived from various analyses sponsored by NASA that show that with mass to engine power ratios within our reach, a 90 day travel time is possible. See here for more on the Gen1 Enterprise missions including the missions to Mars. See here for more on Mars and moon bases with 1g gravity.
For seeing the NASA estimates for mass and engine power needed for a ship to make it to Mars in 90 days, see here. The mass estimates and engine power estimates are derived for the Gen1 Enterprise by way of scaling up the estimates for the NASA spacecrafts.