Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
Depending on the orbital position of Mars and the delta-V you're willing to invest, anything from a year to 5 - an unmanned probe can perform a complex chain of gravitational slingshots to make do without huge (and expensive rockets) whereas humans have to wait for convenient launch windows, which are decades apart.