We’re fortunate to live in a time when we have two new launch rockets intended to enable crewed launches to Mars.
The two rockets on the left have flown already. The Falcon Heavy flew in 2018 and is currently 32M miles from home traveling at 58K mph. The Saturn V launched the Apollo Missions between 1967-1973.
The two rockets on the right haven’t flown yet. Boeing’s Space Launch System is more expensive and also is not reusable, so it has larger expected price (green bar graph) and $ per kilogram (blue bar graph) characteristics.